{"id":1990,"date":"2026-04-13T10:58:50","date_gmt":"2026-04-13T08:58:50","guid":{"rendered":"https:\/\/www.efsfasteners.com\/?post_type=avada_portfolio&#038;p=1990"},"modified":"2026-04-13T11:45:02","modified_gmt":"2026-04-13T09:45:02","slug":"flanged-extension-nut","status":"publish","type":"avada_portfolio","link":"https:\/\/www.efsfasteners.com\/en\/portfolio-items\/flanged-extension-nut\/","title":{"rendered":"Flanged Extension Nut"},"content":{"rendered":"<p>The <strong>flanged extension nut<\/strong> is a special fastener designed to extend threaded connections while ensuring stability, load distribution and high mechanical strength; EFS supplies it as a custom-designed component in 39NiCrMo3 steel for high-performance machinery applications.<\/p>\n<p>This component belongs to the category of special fasteners: it is not a standard product but is engineered according to specific dimensional and functional requirements.<\/p>\n<p>The specific characteristics of the flanged extension nut shown in the picture are:<\/p>\n<p>Size: M16 \u00d7 height 40 mm (including flange)<\/p>\n<p>Manufacturing: custom-made according to drawing, fully machined<\/p>\n<p>Material: 39NiCrMo3, quenched and tempered.<\/p>\n<p>The term \u201cextension\u201d refers to its primary function\u2014<strong>extending a threaded connection<\/strong>\u2014while the integrated flange provides a key element of stability and load distribution.<\/p>\n<h2>What is a flanged extension nut<\/h2>\n<p>A flanged extension nut is a custom-designed fastening element that combines thread extension capability with an integrated flange to improve load distribution, joint stability and overall durability.<\/p>\n<h2>Why the flange improves performance<\/h2>\n<p>The integrated flange performs several critical functions:<\/p>\n<ul>\n<li>Uniform load distribution across the bearing surface<\/li>\n<li>Reduction of localised stresses, preventing deformation of mating components<\/li>\n<li>Improved <strong>tightening stability<\/strong>, particularly under vibration<\/li>\n<li>Elimination or reduction of the need for washers.<\/li>\n<\/ul>\n<p>In dynamic applications or those subject to cyclic loading, this geometry significantly enhances the reliability of the fastening system.<\/p>\n<h2>Why choose 39NiCrMo3 steel for custom nuts<\/h2>\n<p>The selection of <strong>39NiCrMo3 <\/strong>steel is deliberate. It is a quenched and tempered alloy steel characterised by:<\/p>\n<ul>\n<li><strong>High mechanical strength<\/strong> after heat treatment<\/li>\n<li>Excellent toughness, even at low temperatures<\/li>\n<li><strong>Good fatigue resistance,<\/strong> essential in machinery applications<\/li>\n<li>High hardenability, making it suitable for components with significant cross-sections.<\/li>\n<\/ul>\n<p>Compared to more conventional materials (such as carbon steels like C45 or standard property classes such as 8.8), 39NiCrMo3 provides <strong>superior performance in terms of durability and safety<\/strong>, particularly under severe operating conditions.<\/p>\n<h2>Applications of flanged extension nuts in the machinery sector<\/h2>\n<p>Flanged extension nuts are widely used across several industrial sectors, including:<\/p>\n<ul>\n<li>Automatic machinery and production lines<\/li>\n<li>Gearboxes, shafts and transmission systems<\/li>\n<li>Heavy structural fabrication and mechanical assemblies<\/li>\n<li>Energy sector and industrial plants.<\/li>\n<\/ul>\n<p>In these applications, the combination of custom geometry and high-performance material ensures optimal integration within the design, reducing critical issues and maintenance requirements.<\/p>\n<h2>Why it is a high-performance solution<\/h2>\n<p>A custom flanged extension nut manufactured in 39NiCrMo3 with an integrated flange delivers high performance by combining:<\/p>\n<ul>\n<li>Design precision tailored to the specific application<\/li>\n<li>Structural reliability due to alloy steel properties<\/li>\n<li><strong>Assembly efficiency<\/strong>, reducing the need for additional components<\/li>\n<li><strong>Long-term durability<\/strong>, even in demanding environments.<\/li>\n<\/ul>\n<p>It therefore contributes directly to the safety and performance of the entire system.<\/p>\n<p>EFS supports this approach with the capability to manufacture <strong>custom flanged extension nuts,<\/strong> optimised for critical industrial applications and supplied with 3.1 certification.<\/p>\n<p>Discover all <a href=\"https:\/\/www.efsfasteners.com\/prodotti\/dadi\/\">special nuts supplied by EFS.<\/a><\/p>\n<h2><strong>FAQ \u2013 Flanged Extension Nut<\/strong><\/h2>\n<p><strong>What is a flanged extension nut?<\/strong><br \/>\nA flanged extension nut is a special fastener designed to extend a threaded connection while distributing load through an integrated flange, improving stability and strength.<\/p>\n<p><strong>What is the function of the flange in a nut?<\/strong><br \/>\nThe flange distributes loads more evenly, reduces local stresses and increases tightening stability, particularly in applications subject to vibration.<\/p>\n<p><strong>Why use 39NiCrMo3 for custom nuts?<\/strong><br \/>\n39NiCrMo3 offers high mechanical strength, excellent toughness and fatigue resistance, making it ideal for heavy-duty industrial applications.<\/p>\n<p><strong>Where are flanged extension nuts used?<\/strong><br \/>\nThey are used in automatic machinery, gear systems, transmission assemblies, heavy fabrication and industrial plants.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The flanged extension nut is a special fastener designed to extend threaded connections while ensuring stability, load distribution and high mechanical strength. EFS supplies it as a custom-designed component in 39NiCrMo3 steel for high-performance machinery applications.<\/p>\n","protected":false},"author":1,"featured_media":1988,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"portfolio_category":[28],"portfolio_skills":[],"portfolio_tags":[],"class_list":["post-1990","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-mechanics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Flanged Extension Nut Made to Drawing | EFS for Machinery - EFS Srl European Fasteners Solutions<\/title>\n<meta name=\"description\" content=\"EFS for industrial engineering: flanged extension nut made to drawing in 39NiCrMo3, offering high strength, stability, and durability.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.efsfasteners.com\/en\/portfolio-items\/flanged-extension-nut\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flanged Extension Nut Made to Drawing | EFS for Machinery\" \/>\n<meta property=\"og:description\" content=\"EFS for industrial engineering: flanged extension nut made to drawing in 39NiCrMo3, offering high strength, stability, and durability.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.efsfasteners.com\/en\/portfolio-items\/flanged-extension-nut\/\" \/>\n<meta property=\"og:site_name\" content=\"EFS Srl European Fasteners Solutions\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/eufastenersol\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-13T09:45:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.efsfasteners.com\/wp-content\/uploads\/2026\/04\/efs-flanged-extension-nut-2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@eufastenersol\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.efsfasteners.com\\\/en\\\/portfolio-items\\\/flanged-extension-nut\\\/\",\"url\":\"https:\\\/\\\/www.efsfasteners.com\\\/en\\\/portfolio-items\\\/flanged-extension-nut\\\/\",\"name\":\"Flanged Extension Nut Made to Drawing | EFS for Machinery - 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