{"id":6624,"date":"2022-10-20T09:03:50","date_gmt":"2022-10-20T01:03:50","guid":{"rendered":"https:\/\/xzfastener.com\/?p=6624"},"modified":"2026-06-18T09:05:19","modified_gmt":"2026-06-18T01:05:19","slug":"en-structural-fastener-standards-what-project-buyers-should-confirm","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/it\/en-structural-fastener-standards-what-project-buyers-should-confirm\/","title":{"rendered":"EN Standard di fissaggio strutturale: cosa dovrebbero confermare gli acquirenti del progetto"},"content":{"rendered":"<p>On European structural projects, fasteners are not accepted only because the size and grade look correct. Site inspectors usually check the standard, assembly marking, documents, coating, batch labels, and whether the bolts match the project specification.<\/p>\n\n\n\n<p>This is where many purchasing mistakes happen.<\/p>\n\n\n\n<p>A buyer may order \u201cM20 grade 8.8 bolts\u201d and believe the requirement is complete. But if the project calls for EN 15048 or EN 14399 structural bolting assemblies, a general-purpose bolt may not pass site inspection.<\/p>\n\n\n\n<p>For project buyers, the first job is not to find the lowest price. It is to confirm exactly which EN structural fastener standard applies.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why EN Structural Fastener Standards Matter<\/h2>\n\n\n\n<p>EN standards help define how structural fasteners are manufactured, matched, marked, documented, and used in steel or aluminum structures. They reduce guesswork between the buyer, supplier, contractor, and inspector.<\/p>\n\n\n\n<p>For sourcing regular or structural items, buyers can review <a href=\"https:\/\/xzfastener.com\/it\/products-category\/standard-fasteners\/\">elementi di fissaggio standard<\/a> e <a href=\"https:\/\/xzfastener.com\/it\/products-category\/high-strength-fasteners\/\">elementi di fissaggio ad alta resistenza<\/a> prima di preparare la richiesta di offerta.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What the Standard Controls<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Articolo<\/th><th>Perch\u00e9 \u00e8 importante sul posto<\/th><\/tr><\/thead><tbody><tr><td>Product dimensions<\/td><td>Confirms bolt, nut, and washer fit<\/td><\/tr><tr><td>Classe di propriet\u00e0 meccanica<\/td><td>Confirms strength and load suitability<\/td><\/tr><tr><td>Corrispondenza dell'assemblaggio<\/td><td>Prevents random bolt-nut-washer combinations<\/td><\/tr><tr><td>Marcatura<\/td><td>Helps inspectors verify compliance<\/td><\/tr><tr><td>Rivestimento<\/td><td>Influisce sulla resistenza alla corrosione e sull'adattamento della filettatura<\/td><\/tr><tr><td>Documentazione<\/td><td>Supports CE, DoP, MTC, and traceability review<\/td><\/tr><tr><td>Etichette per imballaggi<\/td><td>Prevents mixed lots and wrong installation<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>In the warehouse or on the job site, missing labels and incomplete documents can stop installation even when the physical fasteners look acceptable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">EN 15048 rispetto a EN 14399<\/h2>\n\n\n\n<p>The most common confusion is between EN 15048 and EN 14399. They are not the same.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Main Difference<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Standard Series<\/th><th>Tipo di fissaggio<\/th><th>Uso tipico<\/th><th>Attenzione all'acquirente<\/th><\/tr><\/thead><tbody><tr><td>EN15048<\/td><td>Assiemi di bullonatura strutturale non precaricati<\/td><td>Structural joints not requiring controlled preload<\/td><td>SB marking, assembly matching, documentation<\/td><\/tr><tr><td>EN14399<\/td><td>Assiemi di bullonatura strutturale ad alta resistenza per il precarico<\/td><td>Preloaded structural connections<\/td><td>HV\/HR system, preload method, washers, installation control<\/td><\/tr><tr><td>EN 1090-2<\/td><td>Execution of steel structures<\/td><td>Installation and workmanship requirements<\/td><td>Tightening method, inspection, project execution rules<\/td><\/tr><tr><td>Project specification<\/td><td>Job-specific requirement<\/td><td>Bridges, buildings, towers, industrial structures<\/td><td>Final approval conditions<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The buyer should never replace one with another without written project approval. Same diameter does not mean same function.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cosa devono confermare gli acquirenti prima di ordinare<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Connection Type<\/h3>\n\n\n\n<p>First confirm whether the joint is non-preloaded or preloaded. This decision usually comes from the structural design or project specification.<\/p>\n\n\n\n<p>Non-preloaded joints may call for EN 15048 assemblies. Preloaded joints usually require EN 14399 assemblies and controlled installation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Complete Assembly<\/h3>\n\n\n\n<p>Structural bolts are often checked as assemblies. That means the bolt, nut, and washer must match.<\/p>\n\n\n\n<p>A safe RFQ should define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bolt standard and size<\/li>\n\n\n\n<li>Classe immobile<\/li>\n\n\n\n<li>Standard e grado del dado<\/li>\n\n\n\n<li>Tipo e durezza della rondella<\/li>\n\n\n\n<li>Rivestimento o finitura<\/li>\n\n\n\n<li>Required marking<\/li>\n\n\n\n<li>CE and DoP requirement<\/li>\n\n\n\n<li>Tracciabilit\u00e0 del lotto<\/li>\n\n\n\n<li>Packing and label format<\/li>\n<\/ul>\n\n\n\n<p>For complete supply planning, buyers can review the full <a href=\"https:\/\/xzfastener.com\/it\/home\/products\/\">prodotti di fissaggio<\/a> allineare.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Marking and Traceability<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Do Not Ignore Small Marks<\/h3>\n\n\n\n<p>In structural projects, marking is not decoration. It helps inspectors confirm product identity.<\/p>\n\n\n\n<p>Check for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Identificazione del produttore<\/li>\n\n\n\n<li>Classe immobile<\/li>\n\n\n\n<li>System marking where applicable<\/li>\n\n\n\n<li>Batch or lot reference<\/li>\n\n\n\n<li>Package label information<\/li>\n\n\n\n<li>Assembly identification<\/li>\n<\/ul>\n\n\n\n<p>If different sizes or lots are packed together poorly, the job site can lose traceability quickly. That creates disputes during inspection.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Coating and Surface Finish<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Coating Must Match the Standard and Project<\/h3>\n\n\n\n<p>Common finishes include plain, zinc plated, hot-dip galvanized, and zinc flake coatings. Each finish has different effects on corrosion resistance, thread fit, and tightening behavior.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Finisci<\/th><th>Preoccupazione tipica<\/th><\/tr><\/thead><tbody><tr><td>Plain \/ black<\/td><td>Needs rust prevention during shipping and storage<\/td><\/tr><tr><td>Zincato<\/td><td>May not suit heavy outdoor exposure<\/td><\/tr><tr><td>Zincato a caldo<\/td><td>Thread fit and nut compatibility must be checked<\/td><\/tr><tr><td>Scaglie di zinco<\/td><td>Good corrosion resistance with controlled thickness<\/td><\/tr><tr><td>PTFE or special coating<\/td><td>Torque and approval requirements must be reviewed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>For outdoor or corrosion-sensitive structures, compare <a href=\"https:\/\/xzfastener.com\/it\/products-category\/various-coated-fasteners\/\">vari elementi di fissaggio rivestiti<\/a> prima di finalizzare l'ordine.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Site Problems I Have Seen<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Wrong Standard on the RFQ<\/h3>\n\n\n\n<p>The buyer sends only \u201cM24 \u00d7 100, grade 10.9.\u201d The supplier quotes a general bolt. The project later asks for EN 14399. The price, documents, and production route all change.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Loose Bolts, Nuts and Washers from Different Lots<\/h3>\n\n\n\n<p>This is risky for structural assemblies. It may pass a quick visual check, but fail document review.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Missing DoP or CE Documents<\/h3>\n\n\n\n<p>For European projects, compliance paperwork can be as important as the product itself. If documents are not prepared before shipment, the buyer may face site delays.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Coating Approved Too Late<\/h3>\n\n\n\n<p>Hot-dip galvanizing or zinc flake coating should be confirmed early. Coating affects lead time, thread fit, and packing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">RFQ Checklist for EN Structural Fasteners<\/h2>\n\n\n\n<p>Prima di richiedere un preventivo fornire:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Project standard: EN 15048, EN 14399, EN 1090-2, or project drawing<\/li>\n\n\n\n<li>Connection type: non-preloaded or preloaded<\/li>\n\n\n\n<li>Bolt diameter, length, thread pitch, and thread length<\/li>\n\n\n\n<li>Property class and material requirement<\/li>\n\n\n\n<li>Requisito di corrispondenza di dado e rondella<\/li>\n\n\n\n<li>Finitura superficiale o rivestimento<\/li>\n\n\n\n<li>CE marking, DoP, MTC, and inspection documents<\/li>\n\n\n\n<li>Marking and packaging requirements<\/li>\n\n\n\n<li>Quantity by size and assembly type<\/li>\n\n\n\n<li>Delivery schedule and inspection procedure<\/li>\n<\/ol>\n\n\n\n<p>For special lengths, non-standard heads, special coatings, or drawing-based parts, use <a href=\"https:\/\/xzfastener.com\/it\/products-category\/custom-non-standard-fasteners\/\">elementi di fissaggio personalizzati non standard<\/a> and confirm the EN compliance requirement before production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Consiglio finale<\/h2>\n\n\n\n<p>EN structural fastener standards should be confirmed before price negotiation. The right question is not only \u201cwhat size and grade?\u201d It is \u201cwhich EN standard, which assembly, which documents, and which installation method?\u201d<\/p>\n\n\n\n<p>Clear answers at the RFQ stage prevent rejected shipments, site delays, and costly rework.<\/p>","protected":false},"excerpt":{"rendered":"<p>On European structural projects, fasteners are not accepted only because the size and grade look correct. Site inspectors usually check the standard, assembly marking, documents, coating, batch labels, and whether the bolts match the project specification. This is where many purchasing mistakes happen. A buyer may order \u201cM20 grade 8.8 bolts\u201d and believe the requirement [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[479],"tags":[497],"class_list":["post-6624","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-fastener-standards-cross-reference"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/posts\/6624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/comments?post=6624"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/posts\/6624\/revisions"}],"predecessor-version":[{"id":6625,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/posts\/6624\/revisions\/6625"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/media?parent=6624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/categories?post=6624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/it\/wp-json\/wp\/v2\/tags?post=6624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}