{"id":14617,"date":"2026-10-29T14:56:28","date_gmt":"2026-10-29T06:56:28","guid":{"rendered":"https:\/\/sunhyings.com\/?p=14617"},"modified":"2026-10-29T14:56:28","modified_gmt":"2026-10-29T06:56:28","slug":"a325t-fully-threaded-structural-bolts-specification-and-procurement-checks","status":"publish","type":"post","link":"https:\/\/sunhyings.com\/ar\/blog\/a325t-fully-threaded-structural-bolts-specification-and-procurement-checks\/","title":{"rendered":"\u0628\u0631\u0627\u063a\u064a \u0625\u0646\u0634\u0627\u0626\u064a\u0629 \u0645\u0644\u0648\u0644\u0628\u0629 \u0628\u0627\u0644\u0643\u0627\u0645\u0644 A325T: \u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0648\u0641\u062d\u0648\u0635\u0627\u062a \u0627\u0644\u0634\u0631\u0627\u0621"},"content":{"rendered":"\n<style>\n\/* Scoped presentation adjustments for the existing technical tables and equations. *\/\n.sunhy-blog-article{max-width:100%;overflow-wrap:break-word;}\n.sunhy-blog-article 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p{margin:14px 0 0}.sunhy-blog-article .sunhy-faq summary:focus-visible{outline:3px solid #bc842d;outline-offset:4px}\n<\/style>\n<article class=\"sunhy-blog-article\">\n  <aside class=\"sunhy-summary-box sunhy-added\" aria-label=\"Quick answer\"><p class=\"sunhy-box-label\">Quick answer<\/p><p>An <strong>A325T bolt<\/strong> is a fully threaded ASTM F3125 Grade A325 heavy hex structural bolt specified under Supplementary Requirement S1. According to the American Institute of Steel Construction (AISC) and the 2025 Research Council on Structural Connections (RCSC) specification, this option applies to nominal bolt lengths no greater than four times the nominal diameter (L \u2264 4D). Because the shank is fully threaded, a structural connection using A325T must be evaluated with the threads included in the shear plane where bolt shear strength is relevant.<\/p><\/aside><nav class=\"sunhy-toc sunhy-added\" aria-label=\"Article contents\"><p class=\"sunhy-toc-title\">In this guide<\/p><ol><li><a href=\"#what-does-a325t-mean-under-astm-f3125\">What Does A325T Mean Under ASTM F3125?<\/a><\/li><li><a href=\"#the-4d-limit-a325t-versus-standard-a325-and-a325s\">The 4D Limit: A325T Versus Standard A325 and A325S<\/a><\/li><li><a href=\"#why-fully-threaded-a325t-bolts-change-the-shear-plane-check\">Why Fully Threaded A325T Bolts Change the Shear-Plane Check<\/a><\/li><li><a href=\"#head-markings-thread-geometry-and-receiving-checks\">Head Markings, Thread Geometry and Receiving Checks<\/a><\/li><li><a href=\"#how-to-specify-a325t-bolts-in-an-rfq-and-purchase-order\">How to Specify A325T Bolts in an RFQ and Purchase Order<\/a><\/li><li><a href=\"#sunhy-faq-14617\">Frequently asked questions<\/a><\/li><\/ol><\/nav>\n  <p>That distinction matters when a buyer is replacing a conventional Grade A325 bolt or consolidating several bolt lengths into one stocked item. The required tensile grade may remain unchanged, yet the bolt&#8217;s thread configuration can change the approved connection design assumptions. A325T is therefore a specific product configuration\u2014not a blanket authorization to substitute fully threaded bolts into any structural joint.<\/p>\n  <p>The purchase specification should identify the governing ASTM F3125 edition, the required full-thread configuration, bolt dimensions, matching components and any project-specific acceptance requirements. These details are more useful than simply writing \u201cA325, fully threaded\u201d on an inquiry.<\/p>\n\n  <h2 id=\"what-does-a325t-mean-under-astm-f3125\">What Does A325T Mean Under ASTM F3125?<\/h2>\n  <p>ASTM F3125\/F3125M covers high-strength structural bolts and assemblies, including the familiar <a href=\"https:\/\/sunhyings.com\/fasteners\/bolts\/structural-bolts\/\">Grade A325 heavy hex bolt family<\/a>. Within that specification, the grade, material type and supplementary dimensional configuration describe different product characteristics.<\/p>\n  <aside class=\"sunhy-warning-box sunhy-added\" aria-label=\"Important specification check\"><p class=\"sunhy-box-label\">Important specification check<\/p><p><strong>Grade A325<\/strong> identifies the structural bolt strength classification. Type 1 and Type 3 distinguish material classifications, with Type 3 associated with weathering-steel applications. The letter <strong>T<\/strong> identifies a particular full-length threading provision; it does not establish a different tensile strength grade or mean Type 1.<\/p><\/aside>\n  <p>The <a href=\"https:\/\/www.aisc.org\/aisc\/solutions-center\/engineering-faqs\/6-bolting\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">AISC bolting FAQ<\/a> explains that specifying A325T invokes Supplementary Requirement S1. An appropriately designated A325T bolt carries the A325T head marking so that the configuration can be identified after installation. The applicable product specification and marking requirements still need to be checked for the order&#8217;s governing edition and material type.<\/p>\n  <p>Not every bolt that appears fully threaded should automatically be identified as A325T. The dimensional standard ASME B18.2.6 already calls for certain short structural bolt sizes to be fully threaded. RCSC explains this distinction in its 2025 specification: standard short bolts may have little or no usable unthreaded shank even when an optional full-thread supplement was not specified.<\/p>\n  <p>There is also a separate designation issue on structural drawings. The letters N and X are commonly used to describe whether bolt threads are included in or excluded from the shear plane for connection design. They are not alternate manufacturing grades and should not be confused with the T or S suffixes used for specially specified bolt configurations.<\/p>\n  <p>For procurement, the practical rule is to identify both the <strong>product being ordered<\/strong> and the <strong>connection condition it must satisfy<\/strong>. A grade marking alone cannot resolve both questions.<\/p>\n\n  <h2 id=\"the-4d-limit-a325t-versus-standard-a325-and-a325s\">The 4D Limit: A325T Versus Standard A325 and A325S<\/h2>\n  <p>The defining dimensional screen for A325T is the relationship between nominal bolt diameter and nominal bolt length:<\/p>\n  <p class=\"sunhy-equation\"><strong>L \u2264 4D<\/strong><\/p>\n  <p>Here, <var>L<\/var> is nominal bolt length and <var>D<\/var> is nominal bolt diameter, expressed in the same units. The published AISC guidance and RCSC 2025 commentary describe this four-diameter limit for the optional full-thread configuration. This is an eligibility screen, not a complete dimensional inspection or structural design calculation.<\/p>\n  <p>The distinction between ordinary A325, A325T and A325S is particularly important when specifying bolts longer than the usual fully threaded range.<\/p>\n  <div class=\"sunhy-table-wrap\" role=\"region\" aria-label=\"A325 versus A325T versus A325S configuration comparison\" tabindex=\"0\">\n    <table>\n      <thead><tr><th scope=\"col\">Product designation<\/th><th scope=\"col\">Thread configuration<\/th><th scope=\"col\">Main procurement distinction<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><th scope=\"row\">ASTM F3125 Grade A325<\/th><td>Standard thread arrangement under the applicable dimensional requirements; certain short bolts may already be fully threaded<\/td><td>Confirm standard dimensions and actual thread location<\/td><\/tr>\n        <tr><th scope=\"row\">Grade A325T, S1<\/th><td>Optional fully threaded configuration with a nominal length limited to 4D under the cited guidance<\/td><td>Explicitly request the full-thread supplement and verify the governing edition<\/td><\/tr>\n        <tr><th scope=\"row\">Grade A325S, S2<\/th><td>Separately ordered special dimensional configuration, potentially including nonstandard thread lengths<\/td><td>Specify the dimensional variation and obtain the necessary product and engineering acceptance<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>The S2 provision is important because the four-diameter limit should not be interpreted as proof that every longer fully threaded Grade A325 configuration is impossible. RCSC describes separately ordered special thread lengths identified by an S marking. However, S2 is not permission to take an ordinary product, extend its threads and declare it compliant without checking the applicable specification and project requirements.<\/p>\n  <h3>Hypothetical example: screening a 3\/4-inch bolt request<\/h3>\n  <p>Assume a steelwork purchasing schedule contains two proposed fully threaded Grade A325 heavy hex bolts, both with a nominal diameter of 3\/4 in.:<\/p>\n  <ul>\n    <li>Candidate A: 3\/4 in. diameter \u00d7 3.00 in. nominal length.<\/li>\n    <li>Candidate B: 3\/4 in. diameter \u00d7 3.25 in. nominal length.<\/li>\n  <\/ul>\n  <p>The four-diameter screen is:<\/p>\n  <p class=\"sunhy-equation\"><strong>L<sub>limit<\/sub> = 4 \u00d7 (0.75 in.) = 3.00 in.<\/strong><\/p>\n  <p>Candidate A is exactly at the stated limit. Its length satisfies this preliminary S1 screen, provided the governing standard edition and other product conditions permit the configuration.<\/p>\n  <p>Candidate B exceeds the limit by 0.25 in. Its nominal length-to-diameter ratio is:<\/p>\n  <p class=\"sunhy-equation\"><strong>3.25 \/ 0.75 \u2248 4.33<\/strong><\/p>\n  <p>It should therefore not be ordered as an ordinary S1 A325T solely on the basis that the requested bolt is fully threaded. The purchaser should clarify whether a special configuration is required, whether it is permitted under the governing specification, and whether the structural engineer has approved the proposed arrangement.<\/p>\n  <p>These calculations establish only the nominal length relationship. They do not verify thread geometry, thread-start position, dimensional tolerances, nut engagement, product conformity or structural capacity.<\/p>\n  <p>That is why the inquiry should include the applicable dimensional standard or an approved drawing. A visually full-length thread is not sufficient evidence that the manufactured bolt satisfies every requirement of the specified supplementary configuration.<\/p>\n<p class=\"sunhy-engineering-example sunhy-added\" data-example=\"1\">In an illustrative stock-consolidation request, a fully threaded bolt longer than the S1 length condition is described as ordinary A325T. The designation does not become valid because threads can be manufactured. Resolve the exact special configuration and applicable product requirements before quoting, then obtain the connection approval. The <a href=\"https:\/\/sunhyings.com\/blog\/hex-bolt-dimensions-guide-din-931-vs-din-933-differences\/\">full- versus partial-thread comparison<\/a> explains geometry without extending the A325T permission.<\/p>\n\n\n  <figure class=\"sunhy-editorial-figure sunhy-added\"><img loading=\"lazy\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy.webp\" alt=\"Caliper beside a structural bolt and steel plate grip stack\" width=\"1536\" height=\"1024\" loading=\"lazy\" decoding=\"async\" class=\"wp-image-14626\" title=\"A325t fully threaded structural bolts \u2014 illustrative inspection view\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy.webp 1536w, https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy-800x533.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy-1024x683.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy-768x512.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2026\/10\/structural-bolt-grip-length-measurement-sunhy-18x12.webp 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><figcaption>Caliper beside a structural bolt and steel plate grip stack. Illustrative arrangement; appearance does not establish grade or product conformity.<\/figcaption><\/figure><h2 id=\"why-fully-threaded-a325t-bolts-change-the-shear-plane-check\">Why Fully Threaded A325T Bolts Change the Shear-Plane Check<\/h2>\n  <p>The main engineering consequence of A325T is not the ability to engage a nut anywhere along the shank. It is the location of the threaded section relative to the connection&#8217;s shear planes.<\/p>\n  <p>A conventional partially threaded structural bolt has a smooth shank and a threaded end. Depending on bolt length, connected plate thickness and installation arrangement, a connection can sometimes be detailed so that the relevant shear plane passes through the unthreaded shank.<\/p>\n  <p>When the shear plane crosses the threaded portion, the thread roots create a different local cross-section and shear-resistance condition from the full-diameter shank. Structural design provisions account for this distinction.<\/p>\n  <p>The <a href=\"https:\/\/www.boltcouncil.org\/files\/2025RCSCSpecification.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">RCSC 2025 specification<\/a>, Section 5.1 and Table 5.1, distinguishes nominal bolt shear strengths for threads included in and excluded from the shear plane. It does not treat the two configurations as interchangeable merely because the bolts share a strength grade and nominal diameter.<\/p>\n  <p>An A325T bolt is threaded along its shank, so a connection cannot rely on the threads-excluded condition for that bolt. AISC makes this implication explicit in its A325T guidance.<\/p>\n  <p>Consider a steel connection originally detailed with Grade A325 bolts under a threads-excluded shear assumption. A buyer receives a quotation offering A325T bolts of the same diameter, strength grade and nominal length. The two products may appear interchangeable on the purchasing schedule, but the replacement removes the unthreaded shank condition assumed in the design.<\/p>\n  <p>The correct response is not to calculate a universal percentage reduction or assume the change is harmless. The connection must be checked against its approved design basis, including the applicable shear strength, number of shear planes, bolt arrangement and other governing limit states. If the proposed configuration changes an approved design assumption, the responsible structural engineer must resolve that change.<\/p>\n  <p>The reverse distinction also matters: <strong>an ordinary A325 bolt is not necessarily designed with its threads excluded from the shear plane.<\/strong> The actual thread location and adopted connection design condition must be established from the drawing and joint geometry.<\/p>\n  <p>For joints with multiple shear planes, an apparently small change in grip or thread position can complicate the assumption further. The RCSC 2025 commentary takes a conservative approach when threads intersect a shear plane; it does not support simply assigning the threads-excluded condition to another plane without examining the relevant design provisions.<\/p>\n  <p>A325T can still be a sensible option where the approved connection is designed for the appropriate thread condition. The full-thread option may also simplify purchasing and inventory by reducing the need for several bolt lengths. RCSC recognizes that benefit, particularly where other connection limit states govern rather than the bolt&#8217;s shear strength.<\/p>\n  <p>It would be misleading, however, to describe full threading as a general improvement in load capacity. It offers procurement and assembly flexibility within a defined engineering boundary.<\/p>\n  <p><strong>Pretensioning is a separate question.<\/strong> Whether a structural joint is specified as snug-tightened, pretensioned or slip-critical depends on the governing connection requirements. Choosing A325T does not automatically establish the required installation condition, and achieving a specified pretension does not turn a threads-included shear condition into a threads-excluded one.<\/p>\n  <p>The engineer determines the acceptable joint configuration. The purchaser ensures the supplied bolt and complete assembly correspond to that approved requirement.<\/p>\n<p class=\"sunhy-engineering-example sunhy-added\" data-example=\"2\">A hypothetical site substitute keeps the A325 diameter and nominal length but replaces the smooth-shank configuration with A325T. If the drawing relies on threads excluded from a shear plane, that design assumption has changed. Hold the substitution and have the responsible engineer check the actual connection. A matching nut and head marking cannot restore an unavailable unthreaded shank.<\/p>\n\n\n  <h2 id=\"head-markings-thread-geometry-and-receiving-checks\">Head Markings, Thread Geometry and Receiving Checks<\/h2>\n  <p>An incoming inspection should answer three different questions: Is this the product ordered? Does its physical configuration match the specification? Is there documentary evidence supporting the required conformity?<\/p>\n  <p>These checks overlap, but none replaces the others.<\/p>\n  <p><strong>Start with product identification.<\/strong> For an S1 fully threaded Grade A325 bolt, check the required A325T designation and the applicable manufacturer identification. A special-dimensional S2 order requires its appropriate designation, such as A325S, rather than treating the T and S markings as interchangeable. Material-type identification and other marking details must also agree with the governing product requirements.<\/p>\n  <p>A bolt carrying an expected head marking is not automatically proven to meet its chemical, mechanical and dimensional requirements. Markings identify a claimed product classification; acceptance also depends on the relevant inspection evidence.<\/p>\n  <p><strong>Next, check the ordered geometry.<\/strong> Compare nominal diameter and length with the purchase order. For a fully threaded bolt, examine thread coverage, thread runout and the transition near the under-head bearing surface against the specified requirement.<\/p>\n  <p>This is where photographs can be deceptive. A thread may appear to reach the head while the location of its first complete form or the applicable runout geometry differs from the dimensional acceptance requirement. Measurements and suitable thread gauges should be applied according to the governing specification or approved drawing.<\/p>\n  <p>Older manufacturer technical references discuss specific limits expressed as numbers of thread pitches from the bearing surface. Those figures should not be treated as verified acceptance values for ASTM F3125\/F3125M-26 without confirming that edition&#8217;s requirements. A receiving checklist should instead identify the standard, drawing and applicable inspection method.<\/p>\n  <p><strong>Then review the documentation.<\/strong> Where required by the order and governing specification, compare the supplier&#8217;s product test reports and conformity documents with the supplied grade, type, size, finish and identifiable lot or shipment records. A certificate of conformity, a material test report and a dimensional inspection report are different forms of evidence; one should not be assumed to contain every result provided by the others.<\/p>\n  <p>The associated nuts and washers deserve their own verification. Their specified grades, dimensions and finish must be compatible with the bolt and the applicable structural bolting requirements. Coated assemblies can introduce further conditions concerning nut fit, lubrication and assembly performance. For example, galvanized high-strength bolting components require more than independently selecting a galvanized bolt and a nominally matching nut.<\/p>\n  <p>The 2025 RCSC specification addresses matching components and relevant product-report requirements separately from joint installation verification. When a selected installation method requires pre-installation verification using representative bolting assemblies, that operation checks the assembly and installation process under specified conditions. It does not substitute for manufacturing test records or establish the chemical composition of a supplied bolt.<\/p>\n  <p>A receiving inspection should flag an unexplained marking difference, an out-of-scope length, an unspecified special thread configuration or mismatched assembly documents before the components are released for use.<\/p>\n\n  <h2 id=\"how-to-specify-a325t-bolts-in-an-rfq-and-purchase-order\">How to Specify A325T Bolts in an RFQ and Purchase Order<\/h2>\n  <p>An effective A325T request starts with the approved structural connection requirement, not with a supplier&#8217;s description of an available fully threaded bolt.<\/p>\n  <p>For a typical project-specific inquiry, the following fields give the manufacturer or distributor enough information to identify the intended configuration and raise any conflicts before an order is accepted:<\/p>\n  <div class=\"sunhy-table-wrap\" role=\"region\" aria-label=\"A325T purchase order and RFQ specification checks\" tabindex=\"0\">\n    <table>\n      <thead><tr><th scope=\"col\">RFQ field<\/th><th scope=\"col\">Information to provide<\/th><th scope=\"col\">Why it matters<\/th><\/tr><\/thead>\n      <tbody>\n        <tr><th scope=\"row\">Product specification<\/th><td>ASTM F3125\/F3125M and governing edition<\/td><td>Identifies the contractual product requirements<\/td><\/tr>\n        <tr><th scope=\"row\">Grade and material type<\/th><td>Grade A325 and the required Type 1 or Type 3 classification<\/td><td>Prevents confusion between strength classification and material type<\/td><\/tr>\n        <tr><th scope=\"row\">Thread configuration<\/th><td>S1\/A325T or a separately specified S2 special configuration<\/td><td>Establishes which threading requirements apply<\/td><\/tr>\n        <tr><th scope=\"row\">Bolt dimensions<\/th><td>Nominal diameter, nominal length and applicable dimensional reference<\/td><td>Allows the configuration and 4D eligibility to be checked<\/td><\/tr>\n        <tr><th scope=\"row\">Threading detail<\/th><td>Required thread coverage, drawing and inspection criteria where applicable<\/td><td>Avoids vague \u201cfull thread\u201d descriptions<\/td><\/tr>\n        <tr><th scope=\"row\">Finish and matching parts<\/th><td>Coating, nut and washer requirements, with approved assembly specification<\/td><td>Prevents incompatible or incomplete bolting assemblies<\/td><\/tr>\n        <tr><th scope=\"row\">Quantity and documentation<\/th><td>Quantity, drawing reference, identification and required product\/inspection reports<\/td><td>Supports a clear quotation and receiving acceptance<\/td><\/tr>\n        <tr><th scope=\"row\">Connection approval basis<\/th><td>Relevant structural drawing and any approved substitution requirements<\/td><td>Separates supplier product conformity from engineering authorization<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>If the engineer has already approved A325T with threads included in the shear plane, the buyer can communicate that configuration directly. If the drawing instead specifies a conventional bolt arrangement or an excluded-thread shear condition, the inquiry should identify the difference and request engineering clarification before substitution.<\/p>\n  <p>A useful RFQ description for the hypothetical 3\/4 in. \u00d7 3.00 in. candidate, after engineering selection, could be structured as follows:<\/p>\n  <p><strong>Product:<\/strong> ASTM F3125 Grade A325 heavy hex structural bolt, Supplementary Requirement S1 (A325T), nominal diameter 3\/4 in., nominal length 3.00 in., with the governing ASTM edition, material type, finish, matching components and inspection documentation stated in the purchase order. The specified thread configuration and structural connection design basis must agree with the approved project documents.<\/p>\n  <p>This wording illustrates the specification structure; it is not a claim that any supplier has manufactured, tested or stocked that particular item. It also does not replace verification of the current applicable supplementary requirement.<\/p>\n  <p>For a bolt longer than 4D with extended threading, do not simply change the description from A325T to A325S and proceed. The intended special dimensions must be confirmed, the applicable S2 requirements reviewed, and the change assessed against the connection design. A supplier&#8217;s ability to machine the requested threads does not establish its acceptability in the structure.<\/p>\n  <p>Before releasing the purchase order, the buyer should be able to answer two questions independently: <strong>Does the offered bolt meet the specified product requirements? And does that actual configuration match the approved structural connection?<\/strong><\/p>\n  <aside class=\"sunhy-procurement-note sunhy-added\"><p>If either answer is unknown, the missing item should be resolved by the responsible supplier, inspector or structural engineer before acceptance. For a <a href=\"https:\/\/sunhyings.com\/contact-us\/\">technical inquiry<\/a>, provide the bolt drawing, required ASTM edition, diameter, length, threading configuration, finish, matching components and documentation requirements so that the proposed product can be assessed without assuming availability or conformity in advance.<\/p><\/aside>\n  <p><strong>Technical references:<\/strong> <a href=\"https:\/\/www.aisc.org\/aisc\/solutions-center\/engineering-faqs\/6-bolting\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">AISC Engineering FAQs \u2014 Bolting<\/a>; <a href=\"https:\/\/www.boltcouncil.org\/files\/2025RCSCSpecification.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">RCSC Specification for Structural Joints Using High-Strength Bolts, 2025<\/a>; <a href=\"https:\/\/store.astm.org\/f3125_f3125m-26.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">ASTM F3125\/F3125M-26 official catalog<\/a>; <a href=\"https:\/\/www.portlandbolt.com\/technical\/faqs\/what-is-an-a325-t-bolt\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Portland Bolt \u2014 What Is an A325T Bolt?<\/a>.<\/p>\n<aside class=\"sunhy-related-reading sunhy-added\" aria-label=\"Related technical reading\"><p class=\"sunhy-box-label\">Related technical reading<\/p><ul><li><a href=\"https:\/\/sunhyings.com\/fasteners\/bolts\/structural-bolts\/\">Structural bolt specification and enquiry<\/a><\/li><li><a href=\"https:\/\/sunhyings.com\/blog\/hex-nut-grades-explained\/\">Hex nut grades and selection checks<\/a><\/li><li><a href=\"https:\/\/sunhyings.com\/blog\/understanding-bolt-grades\/\">Bolt grades and strength terminology<\/a><\/li><li><a href=\"https:\/\/sunhyings.com\/blog\/how-to-measure-hex-bolt-dimensions\/\">Bolt length, diameter and pitch measurement<\/a><\/li><li><a href=\"https:\/\/sunhyings.com\/blog\/traceability-for-automotive-fasteners\/\">Fastener lot control and inspection-record principles<\/a><\/li><\/ul><\/aside>\n<section class=\"sunhy-faq sunhy-added\" aria-labelledby=\"sunhy-faq-14617\"><h2 id=\"sunhy-faq-14617\">Frequently asked questions<\/h2><details><summary>What does A325T mean?<\/summary><p>It identifies a supplementary fully threaded A325 configuration. Check the governing edition, marking and dimensional requirements rather than identifying it from appearance alone.<\/p><\/details><details><summary>What does the 4D limit check?<\/summary><p>It compares nominal bolt length with four times nominal diameter for the cited S1 configuration. Passing that screen does not establish full product or joint conformity.<\/p><\/details><details><summary>Can A325T replace a bolt designed with threads excluded?<\/summary><p>Not automatically. A fully threaded configuration changes the shear-plane thread assumption and requires the appropriate connection review and approval.<\/p><\/details><\/section>\n<\/article>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"@id\": \"https:\/\/sunhyings.com\/blog\/a325t-fully-threaded-structural-bolts-specification-and-procurement-checks\/#faq\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does A325T mean?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It identifies a supplementary fully threaded A325 configuration. Check the governing edition, marking and dimensional requirements rather than identifying it from appearance alone.\"}}, {\"@type\": \"Question\", \"name\": \"What does the 4D limit check?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It compares nominal bolt length with four times nominal diameter for the cited S1 configuration. Passing that screen does not establish full product or joint conformity.\"}}, {\"@type\": \"Question\", \"name\": \"Can A325T replace a bolt designed with threads excluded?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Not automatically. A fully threaded configuration changes the shear-plane thread assumption and requires the appropriate connection review and approval.\"}}]}<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>\u062a\u0639\u0631\u0651\u0641 \u0639\u0644\u0649 \u0645\u062a\u0649 \u062a\u0633\u062a\u0648\u0641\u064a \u0628\u0631\u0627\u063a\u064a ASTM F3125 Grade A325T \u0634\u0631\u0648\u0637 \u0627\u0644\u0644\u0648\u0644\u0628\u0629 \u0627\u0644\u0643\u0627\u0645\u0644\u0629\u060c \u0648\u0643\u064a\u0641 \u064a\u0624\u062b\u0631 \u062d\u062f 4D \u0648\u062a\u0635\u0645\u064a\u0645 \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0642\u0635\u060c \u0648\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u0646\u0628\u063a\u064a \u0644\u0644\u0645\u0634\u062a\u0631\u064a\u0646 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646\u0647.<\/p>","protected":false},"author":1,"featured_media":14648,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-14617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides"],"_links":{"self":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/14617","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/comments?post=14617"}],"version-history":[{"count":2,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/14617\/revisions"}],"predecessor-version":[{"id":14715,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/14617\/revisions\/14715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/media\/14648"}],"wp:attachment":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/media?parent=14617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/categories?post=14617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/tags?post=14617"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}