{"id":545,"date":"2019-02-22T21:32:56","date_gmt":"2019-02-22T21:32:56","guid":{"rendered":"https:\/\/hangarmma.com.br\/blog\/?p=545"},"modified":"2025-08-22T15:31:20","modified_gmt":"2025-08-22T18:31:20","slug":"parafusos-e-fixadores-de-aeronaves","status":"publish","type":"post","link":"https:\/\/hangarmma.com.br\/blog\/parafusos-e-fixadores-de-aeronaves\/","title":{"rendered":"Quais as caracter\u00edsticas de Parafusos e fixadores de aeronaves?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Na manuten\u00e7\u00e3o de aeronaves, mesmo um pequeno desvio&nbsp; do projeto original, ou a simples substitui\u00e7\u00e3o de materiais inferiores, pode resultar na perda de vidas e ou equipamentos, isso inclui <strong>parasusos e fixadores de aeronaves<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Isso me faz lembrar o acidente da <strong>British Airways 5390<\/strong> em 1990 causado pela instala\u00e7\u00e3o errada dos fixadores do para-brisas da aeronave. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"490\" height=\"302\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-2.png\" alt=\"\" class=\"wp-image-546\" style=\"width:578px;height:356px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-2.png 490w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-2-300x185.png 300w\" sizes=\"auto, (max-width: 490px) 100vw, 490px\" \/><figcaption class=\"wp-element-caption\"> <br><strong>Acidente da British Airways <\/strong><br><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Para garantir a seguran\u00e7a os&nbsp; itens&nbsp; s\u00e3o&nbsp; identificados&nbsp; por&nbsp; n\u00fameros&nbsp; de&nbsp; especifica\u00e7\u00e3o ou nome do fabricante que devem ser seguidos rigorosamente durante a manuten\u00e7\u00e3o, em sua instala\u00e7\u00e3o, desde um simples rebite at\u00e9 um componente como um radar meteorol\u00f3gico.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"522\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-3.png\" alt=\"\" class=\"wp-image-547\" style=\"width:588px;height:383px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-3.png 799w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-3-300x196.png 300w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-3-768x502.png 768w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><figcaption class=\"wp-element-caption\"><strong>Itens e partes de uma aeronave <\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>IDENTIFICA\u00c7\u00c3O DE MATERIAIS AERON\u00c1UTICOS<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Parafusos e rebites s\u00e3o usualmente identificados pelas letras: <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>AN (Air Force &#8211; Navy) &nbsp; <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NAS (National Aircraft Standard)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MS (Military Standard) <\/strong>seguidas de n\u00fameros.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"424\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-4-1024x424.png\" alt=\"\" class=\"wp-image-549\" style=\"width:774px;height:320px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-4-1024x424.png 1024w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-4-300x124.png 300w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-4-768x318.png 768w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-4.png 1089w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Part number (PN) de rebites e parafusos<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>PARAFUSOS DE AERONAVES<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e3o dispositivos de fixa\u00e7\u00e3o, que permitem\nseguran\u00e7a e rigidez&nbsp; na uni\u00e3o de pe\u00e7as.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Existem dois tipos de parafusos: <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Bolts<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Screws<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bolts: <\/strong>Utilizados quando se necessita grande firmeza. Possui&nbsp; normalmente uma porca como parte integrante do conjunto.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <strong>Screws: <\/strong>de rosca soberba, quando a firmeza n\u00e3o \u00e9 um fator importante.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"849\" height=\"294\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-5.png\" alt=\"\" class=\"wp-image-552\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-5.png 849w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-5-300x104.png 300w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-5-768x266.png 768w\" sizes=\"auto, (max-width: 849px) 100vw, 849px\" \/><figcaption class=\"wp-element-caption\">Bolts e screws<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>CLASSIFICA\u00c7\u00c3O DOS FIOS DE ROSCA <\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Parafusos <strong>bolts<\/strong>, <strong>screws <\/strong>e <strong>porcas <\/strong>s\u00e3o fabricados em um dos&nbsp; seguintes tipos de fios de rosca:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u2022<strong>NC <\/strong>(American National Coarse), s\u00e9rie de filetes grossos destinados ao uso em metais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u2022<strong>NF <\/strong>(American National Fine), <strong>s\u00e9ries de filetes finos <\/strong>destinados ao uso geral em aeronaves e motores;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u2022<strong>UNC &nbsp;<\/strong>(American&nbsp; Standard &nbsp;Unified&nbsp; Coarse) &nbsp;ou &nbsp;UNF &nbsp;(American&nbsp; Standard Unified Fine).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"309\" height=\"277\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-6.png\" alt=\"\" class=\"wp-image-554\" style=\"width:544px;height:488px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-6.png 309w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-6-300x269.png 300w\" sizes=\"auto, (max-width: 309px) 100vw, 309px\" \/><figcaption class=\"wp-element-caption\">Padr\u00e3o de Filetes de roscas<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">No parafuso de uma polegada (1&#8243;) de di\u00e2metro do tipo <strong>NF <\/strong>(American&nbsp; <strong>N<\/strong>ational <strong>F<\/strong>ine), que ser\u00e1 especificado como <strong>1-14NF<\/strong>, indicando possuir 14 fios&nbsp; de rosca em cada polegada.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"357\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-7.png\" alt=\"\" class=\"wp-image-556\" style=\"width:461px;height:358px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-7.png 461w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-7-300x232.png 300w\" sizes=\"auto, (max-width: 461px) 100vw, 461px\" \/><figcaption class=\"wp-element-caption\"><strong>Parafuso tipo NF<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u00c9 considerado o n\u00famero de vezes que o fio de rosca completa uma volta no&nbsp; espa\u00e7o de uma polegada.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Classifica\u00e7\u00e3odos fios de rosca\" width=\"600\" height=\"338\" src=\"https:\/\/www.youtube.com\/embed\/cnm4OanJJew?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">Classifica\u00e7\u00e3o dos fios de rosca<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>PARAFUSOS DE AVIA\u00c7\u00c3O<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e3o fabricados em a\u00e7o resistente \u00e0 corros\u00e3o, com banho de&nbsp; <strong>c\u00e1dmio <\/strong>ou de <strong>zinco<\/strong>, de a\u00e7o resistente \u00e0 corros\u00e3o, sem banho ou&nbsp; ainda de liga de alum\u00ednio <strong>anodizado<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"305\" height=\"204\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-8.png\" alt=\"\" class=\"wp-image-557\" style=\"width:404px;height:270px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-8.png 305w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-8-300x201.png 300w\" sizes=\"auto, (max-width: 305px) 100vw, 305px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Os&nbsp; parafusos&nbsp; especiais s\u00e3o normalmente identificados por&nbsp; uma letra <strong><em>&#8220;S&#8221; <\/em><\/strong>estampada na cabe\u00e7a.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"173\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-9.png\" alt=\"\" class=\"wp-image-558\" style=\"width:292px;height:351px\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>PARAFUSOS DE TOLER\u00c2NCIA M\u00cdNIMA<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"> Esse tipo de parafuso \u00e9 fabricado com mais cuidado do que o de uso geral.&nbsp; Eles s\u00e3o usados em aplica\u00e7\u00f5es onde uma ajustagem forte \u00e9 requerida.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"167\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-10.png\" alt=\"\" class=\"wp-image-559\" style=\"width:230px;height:299px\"\/><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"718\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-11.png\" alt=\"\" class=\"wp-image-560\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-11.png 960w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-11-300x224.png 300w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-11-768x574.png 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong> IDENTIFICA\u00c7\u00c3O E C\u00d3DIGOS DOS PARAFUSOS DE AERONAVES<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Podem ser identificados pelo formato da cabe\u00e7a, m\u00e9todo de fixa\u00e7\u00e3o,&nbsp; material usado na fabrica\u00e7\u00e3o ou emprego  determinado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PART NUMBER AN3DD5A<\/strong><\/p>\n\n\n\n<p class=\"has-accent-color has-text-color has-huge-font-size wp-block-paragraph\"><strong>AN3DD5A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>AN<\/strong>:\nAir\nForce-Navy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3<\/strong>:\nDi\u00e2metro\nem dezesseis avos da polegada (3\/16&#8243;).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DD: <\/strong>Liga\nde alum\u00ednio 2024.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C<\/strong>:\nNo\nlugar de &#8220;D&#8221;, indicaria a\u00e7o resistente \u00e0 corros\u00e3o e, a&nbsp; aus\u00eancia das letras, indicaria a\u00e7o com banho\nde c\u00e1dmio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5<\/strong>: Comprimento em oitavos da polegada (5\/8&#8243;).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A<\/strong>: Indica n\u00e3o possuir furo para contra-pino.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Parafusos de aeronaves para fins especiais<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"> Fabricados para uma particular aplica\u00e7\u00e3o. Exemplo:  <strong>Clevis, Olhal, Jobolts e Lockbolts. <\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PARAFUSOS CLEVIS<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A cabe\u00e7a de um parafuso Clevis \u00e9\nredonda e possui ranhuras para&nbsp; receber\numa chave de fenda comum, ou para receber uma chave em cruz.&nbsp; Caracteristica: <strong>Cargas de <\/strong><strong>Cizalhamento<\/strong><strong> <\/strong>nunca\ntens\u00e3o (tra\u00e7\u00e3o).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"325\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-16.png\" alt=\"\" class=\"wp-image-575\" style=\"width:542px;height:295px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-16.png 594w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-16-300x164.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>PARAFUSOS<\/strong><strong> <\/strong><strong>OLHAL<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Este tipo de parafuso especial \u00e9 usado onde cargas de tens\u00e3o s\u00e3o&nbsp; aplicadas. O Olhal tem por finalidade permitir a  fixa\u00e7\u00e3o de pe\u00e7as.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"178\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-13.png\" alt=\"\" class=\"wp-image-563\" style=\"width:555px;height:175px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-13.png 560w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-13-300x95.png 300w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>JOBOLTS<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A alta resist\u00eancia ao cizalhamento e a tens\u00e3o (tra\u00e7\u00e3o) <\/strong>torna-o&nbsp; adequado ao uso em grandes esfor\u00e7os, onde os outros tipos&nbsp; de fixadores s\u00e3o impratic\u00e1veis.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"518\" height=\"233\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-14.png\" alt=\"\" class=\"wp-image-564\" style=\"width:559px;height:251px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-14.png 518w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-14-300x135.png 300w\" sizes=\"auto, (max-width: 518px) 100vw, 518px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Instala\u00e7\u00e3o de rebite Jobolt\" width=\"600\" height=\"338\" src=\"https:\/\/www.youtube.com\/embed\/tfNEVjXMwO0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\"><strong>Instala\u00e7\u00e3o rebite Jobolt<\/strong><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>LOCKBOLTS<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lockbolts combinam as caracter\u00edsticas de um parafuso e de um rebite de grande&nbsp; resist\u00eancia, mas possuem vantagens sobre ambos. Requer&nbsp; uma&nbsp; ferramenta&nbsp; pneum\u00e1tica&nbsp; para&nbsp; sua&nbsp; instala\u00e7\u00e3o.&nbsp; Quando&nbsp; instalado, ele permanecer\u00e1 r\u00edgido  e permanentemente fixo no local.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"369\" height=\"174\" src=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-15.png\" alt=\"\" class=\"wp-image-566\" style=\"width:472px;height:223px\" srcset=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-15.png 369w, https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/02\/image-15-300x141.png 300w\" sizes=\"auto, (max-width: 369px) 100vw, 369px\" \/><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Instala\u00e7\u00e3o de fixador aeron\u00e1utico Lockbolt\" width=\"600\" height=\"338\" src=\"https:\/\/www.youtube.com\/embed\/9c3K0oObKOs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\"> <br><strong>INSTALA\u00c7\u00c3O DE LOCKBOLTS<\/strong> <\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Parafusos de aeronaves e identifica\u00e7\u00e3o<\/h1>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/youtu.be\/ktNIU63Capc\n<\/div><\/figure>\n\n\n\n<p class=\"has-text-align-left has-very-light-gray-color has-text-color has-background has-medium-font-size wp-block-paragraph\" style=\"background-color:#037fb5\"><strong>MATERIAL DE APOIO<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DOWNLOAD<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/hangarmma.com.br\/blog\/wp-content\/uploads\/2019\/03\/Chapter-05-Aircraft-Materials-Processes-Hardware.pdf\">Chapter 05 Aircraft Materials, Processes &amp; Hardware (ORIGINAL)<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"glossario-fixadores\"><strong>Gloss\u00e1rio \u2014 Parafusos e Fixadores de Aeronaves<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Navega\u00e7\u00e3o r\u00e1pida:<\/strong> <a href=\"#anodizacao\">Anodiza\u00e7\u00e3o<\/a> \u2022 <a href=\"#banho-cadmio\">Banho de c\u00e1dmio<\/a> \u2022 <a href=\"#banho-zinco\">Banho de zinco<\/a> \u2022 <a href=\"#bolts\">Bolts (parafusos com porca)<\/a> \u2022 <a href=\"#carga-cisalhamento\">Carga de cisalhamento<\/a> \u2022 <a href=\"#carga-tracao\">Carga de tra\u00e7\u00e3o<\/a> \u2022 <a href=\"#clevis\">Clevis (parafuso clevis)<\/a> \u2022 <a href=\"#contra-pino\">Contra-pino<\/a> \u2022 <a href=\"#designacoes-an-nas-ms\">Designa\u00e7\u00f5es AN \/ NAS \/ MS<\/a> \u2022 <a href=\"#diametro-dezesseis-avos\">Di\u00e2metro em dezesseis avos<\/a> \u2022 <a href=\"#filetes-rosca\">Filetes de rosca (NC, NF, UNC, UNF)<\/a> \u2022 <a href=\"#jobolt\">Jobolt<\/a> \u2022 <a href=\"#lockbolt\">Lockbolt<\/a> \u2022 <a href=\"#marca-s-cabeca\">Marca \u201cS\u201d na cabe\u00e7a<\/a> \u2022 <a href=\"#material-c-d-dd\">Material do parafuso (C, D, DD)<\/a> \u2022 <a href=\"#min-tolerance\">Parafusos de toler\u00e2ncia m\u00ednima<\/a> \u2022 <a href=\"#part-number\">Part number (ex.: AN3DD5A)<\/a> \u2022 <a href=\"#porca\">Porca<\/a> \u2022 <a href=\"#screws\">Screws (parafusos de rosca soberba)<\/a> \u2022 <a href=\"#tpi\">TPI \u2014 fios por polegada<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"anodizacao\"><strong>Anodiza\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tratamento de superf\u00edcie em ligas de alum\u00ednio que cria uma camada protetora contra corros\u00e3o. Em fixadores, aparece como acabamento t\u00edpico em alguns parafusos de alum\u00ednio.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"banho-cadmio\"><strong>Banho de c\u00e1dmio<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Revestimento aplicado em parafusos de a\u00e7o para melhorar a resist\u00eancia \u00e0 corros\u00e3o e facilitar a montagem (lubricidade). \u00c9 uma forma comum de prote\u00e7\u00e3o em hardware aeron\u00e1utico.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"banho-zinco\"><strong>Banho de zinco<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Prote\u00e7\u00e3o superficial alternativa ao c\u00e1dmio para reduzir corros\u00e3o. O tipo de banho \u00e9 definido pelo projeto e pela norma do fixador.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"bolts\"><strong>Bolts (parafusos com porca)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fixadores usados quando \u00e9 necess\u00e1ria grande firmeza e rigidez. Normalmente trabalham em conjunto com uma porca e, muitas vezes, com arruelas apropriadas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"carga-cisalhamento\"><strong>Carga de cisalhamento<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Esfor\u00e7o lateral que tende a cortar o fixador. Alguns parafusos especiais (como o clevis) s\u00e3o destinados a suportar cisalhamento, n\u00e3o tra\u00e7\u00e3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"carga-tracao\"><strong>Carga de tra\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Esfor\u00e7o axial que \u201cpuxa\u201d o fixador ao longo do seu eixo. Parafusos olhal, por exemplo, s\u00e3o projetados para aplica\u00e7\u00f5es onde a tra\u00e7\u00e3o \u00e9 predominante.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"clevis\"><strong>Clevis (parafuso clevis)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Parafuso especial de cabe\u00e7a redonda com ranhuras para chave de fenda\/cruz. \u00c9 aplicado em <em>cargas de cisalhamento<\/em> (nunca em tra\u00e7\u00e3o), em articula\u00e7\u00f5es e liga\u00e7\u00f5es que pedem pino\/parafuso do tipo \u201cclevis\u201d.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"contra-pino\"><strong>Contra-pino<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dispositivo de seguran\u00e7a passado por um furo na extremidade do parafuso ou porca castelo para impedir afrouxamento. Em c\u00f3digos de pe\u00e7a, a letra final \u201cA\u201d pode indicar que <em>n\u00e3o<\/em> h\u00e1 furo para contra-pino.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"designacoes-an-nas-ms\"><strong>Designa\u00e7\u00f5es AN \/ NAS \/ MS<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sistemas de padroniza\u00e7\u00e3o de hardware aeron\u00e1utico. AN (Air Force\u2013Navy), NAS (National Aircraft Standard) e MS (Military Standard) antecedem n\u00fameros que definem dimens\u00f5es, material e aplica\u00e7\u00e3o do fixador.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"diametro-dezesseis-avos\"><strong>Di\u00e2metro em dezesseis avos<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Forma tradicional de especificar o di\u00e2metro do parafuso em polegadas. Ex.: \u201cAN<strong>3<\/strong>\u201d indica 3\/16\u2033 (tr\u00eas dezesseis avos) de di\u00e2metro.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"filetes-rosca\"><strong>Filetes de rosca (NC, NF, UNC, UNF)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Classifica\u00e7\u00f5es de passo da rosca. NC\/NF s\u00e3o s\u00e9ries American National (grossa\/fina) e UNC\/UNF s\u00e3o s\u00e9ries Unified (grossa\/fina). Em um parafuso \u201c1\u201314NF\u201d, h\u00e1 14 filetes por polegada no padr\u00e3o NF.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"jobolt\"><strong>Jobolt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fixador de alta resist\u00eancia tanto ao cisalhamento quanto \u00e0 tra\u00e7\u00e3o, empregado onde grandes esfor\u00e7os inviabilizam o uso de fixadores convencionais.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"lockbolt\"><strong>Lockbolt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Combina caracter\u00edsticas de parafuso e rebite estrutural. \u00c9 instalado com ferramenta pneum\u00e1tica e, ap\u00f3s montado, permanece r\u00edgido e permanente, oferecendo alta resist\u00eancia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"marca-s-cabeca\"><strong>Marca \u201cS\u201d na cabe\u00e7a<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Letra estampada na cabe\u00e7a que identifica um <em>parafuso especial<\/em>. Indica que o fixador pertence a uma categoria com requisitos al\u00e9m dos de uso geral.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"material-c-d-dd\"><strong>Material do parafuso (C, D, DD)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3digos que aparecem no part number para indicar material\/acabamento. Ex.: \u201cDD\u201d = liga de alum\u00ednio 2024; \u201cC\u201d poderia indicar a\u00e7o resistente \u00e0 corros\u00e3o; aus\u00eancia das letras pode indicar a\u00e7o com banho de c\u00e1dmio (conforme a codifica\u00e7\u00e3o do fabricante\/norma).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"min-tolerance\"><strong>Parafusos de toler\u00e2ncia m\u00ednima<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fabricados com controle dimensional mais apertado do que os de uso geral. Aplicados onde se exige ajuste justo (interfer\u00eancia leve) para rigidez elevada.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"part-number\"><strong>Part number (ex.: AN3DD5A)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3digo que descreve o fixador. Exemplo: \u201cAN\u201d = padr\u00e3o; \u201c3\u201d = di\u00e2metro em dezesseis avos (3\/16\u2033); \u201cDD\u201d = material (liga 2024); \u201c5\u201d = comprimento em oitavos (5\/8\u2033); \u201cA\u201d = sem furo para contra-pino.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"porca\"><strong>Porca<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Elemento roscado que trabalha com o parafuso (bolt). Deve ser compat\u00edvel com o padr\u00e3o de rosca (ex.: UNF) e, quando aplic\u00e1vel, receber dispositivos de seguran\u00e7a (contra-pino, castelo, trava).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"screws\"><strong>Screws (parafusos de rosca soberba)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Parafusos que formam a pr\u00f3pria rosca no material (chapas finas, por exemplo). Usados quando a firmeza extrema n\u00e3o \u00e9 o requisito principal, diferindo dos <em>bolts<\/em> com porca.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"tpi\"><strong>TPI \u2014 fios por polegada<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cThreads Per Inch\u201d: contagem de filetes em uma polegada. Define o passo da rosca e aparece em especifica\u00e7\u00f5es como \u201c1\u201314NF\u201d.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq-fixadores\"><strong>FAQ \u2014 Perguntas Frequentes<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Como diferenciar rapidamente um \u201cbolt\u201d de um \u201cscrew\u201d na pr\u00e1tica?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: O <em>bolt<\/em> normalmente trabalha com porca e \u00e9 escolhido quando a rigidez \u00e9 essencial. O <em>screw<\/em> de rosca soberba cria sua rosca no material (como chapas) e \u00e9 usado onde a exig\u00eancia de firmeza \u00e9 menor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Quando escolher rosca UNF em vez de UNC?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: UNF (fina) \u00e9 preferida em aplica\u00e7\u00f5es aeron\u00e1uticas por permitir maior \u00e1rea de contato e ajuste mais preciso, especialmente em materiais finos; UNC (grossa) \u00e9 mais indicada para materiais macios\/espessos e montagens menos cr\u00edticas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: O que significa \u201cAN3DD5A\u201d em um part number?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Padr\u00e3o AN; di\u00e2metro 3\/16\u2033; material \u201cDD\u201d (liga 2024); comprimento 5\/8\u2033; e \u201cA\u201d informando que o parafuso n\u00e3o possui furo para contra-pino.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Para que serve a letra \u201cS\u201d gravada na cabe\u00e7a do parafuso?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Indica que \u00e9 um parafuso especial, com requisitos al\u00e9m dos de uso geral. Essa marca facilita a identifica\u00e7\u00e3o r\u00e1pida durante a manuten\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Em que situa\u00e7\u00e3o usar um parafuso clevis?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Em articula\u00e7\u00f5es sujeitas predominantemente a cisalhamento. O clevis n\u00e3o deve ser usado para resistir a tra\u00e7\u00e3o axial.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Qual a vantagem de lockbolts em rela\u00e7\u00e3o a bolts tradicionais?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Lockbolts oferecem junta r\u00edgida e permanente, alta resist\u00eancia e consist\u00eancia dimensional ap\u00f3s a instala\u00e7\u00e3o com ferramenta pneum\u00e1tica, reduzindo afrouxamento em servi\u00e7o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: O que s\u00e3o parafusos de toler\u00e2ncia m\u00ednima e por que us\u00e1-los?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: S\u00e3o fixadores usinados com folgas muito pequenas, empregados onde se deseja ajuste forte e m\u00ednimo jogo, aumentando a rigidez da uni\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: O acabamento (c\u00e1dmio, zinco, anodiza\u00e7\u00e3o) muda algo na aplica\u00e7\u00e3o?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Sim. O acabamento influencia a resist\u00eancia \u00e0 corros\u00e3o e a lubrifica\u00e7\u00e3o na montagem. O tipo correto deve seguir a especifica\u00e7\u00e3o do projeto do fixador.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Como interpretar \u201c1\u201314NF\u201d na especifica\u00e7\u00e3o da rosca?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Indica um parafuso de 1\u2033 de di\u00e2metro com 14 fios por polegada no padr\u00e3o NF (s\u00e9rie fina American National).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P: Quando optar por parafusos olhal (eye bolts)?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R: Quando a aplica\u00e7\u00e3o imp\u00f5e <em>tra\u00e7\u00e3o<\/em> axial e \u00e9 necess\u00e1rio um ponto de fixa\u00e7\u00e3o por olhal. Eles n\u00e3o substituem pinos\/clevis em articula\u00e7\u00f5es de cisalhamento.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Na manuten\u00e7\u00e3o de aeronaves, mesmo um pequeno desvio&nbsp; do projeto original, ou a simples substitui\u00e7\u00e3o de materiais inferiores, pode resultar na perda de vidas e ou equipamentos, isso inclui parasusos e fixadores de aeronaves. Isso me faz lembrar o acidente da British Airways 5390 em 1990 causado pela instala\u00e7\u00e3o errada dos fixadores do para-brisas da [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":568,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[149,62],"tags":[21],"class_list":["post-545","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-estruturas","category-manutencao","tag-fixadores"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quais as caracter\u00edsticas de Parafusos e fixadores de aeronaves?<\/title>\n<meta name=\"description\" content=\"Na manuten\u00e7\u00e3o de aeronaves, mesmo um pequeno desvio do projeto original, ou a simples substitui\u00e7\u00e3o de materiais inferiores, pode resultar na perda de vidas e ou 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