{"id":8352,"date":"2026-04-16T21:43:40","date_gmt":"2026-04-16T13:43:40","guid":{"rendered":"https:\/\/xzfastener.com\/?p=8352"},"modified":"2026-06-25T21:47:13","modified_gmt":"2026-06-25T13:47:13","slug":"10b21-carbon-steel-screws-wholesale-supplier","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/10b21-carbon-steel-screws-wholesale-supplier\/","title":{"rendered":"10B21 carbon steel screws wholesale supplier"},"content":{"rendered":"\n<style>\n.xz-wp-product-page {\n  --xz-blue: #0b2d4d;\n  --xz-blue-2: #123f68;\n  --xz-blue-3: #1c5b89;\n  --xz-soft: #eef5fb;\n  --xz-soft-2: #f7fafd;\n  --xz-line: #d8e5ef;\n  --xz-text: #1f2d3a;\n  --xz-muted: #5b6b7a;\n  --xz-white: #ffffff;\n  font-family: Arial, Helvetica, sans-serif;\n  color: var(--xz-text);\n  background: var(--xz-white);\n  line-height: 1.62;\n}\n.xz-wp-product-page * {\n  box-sizing: border-box;\n}\n.xz-wp-product-page a {\n  color: var(--xz-blue-3);\n  font-weight: 700;\n  text-decoration: 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top;\n}\n.xz-wp-product-page tr:nth-child(even) td {\n  background: #f4f8fc;\n}\n.xz-wp-product-page .xz-apps {\n  display: grid;\n  grid-template-columns: repeat(3, minmax(0, 1fr));\n  gap: 14px;\n}\n.xz-wp-product-page .xz-app {\n  background: var(--xz-white);\n  border: 1px solid var(--xz-line);\n  border-radius: 6px;\n  padding: 18px;\n  min-height: 128px;\n}\n.xz-wp-product-page details {\n  background: var(--xz-white);\n  border: 1px solid var(--xz-line);\n  border-radius: 6px;\n  padding: 16px 18px;\n  margin: 10px 0;\n}\n.xz-wp-product-page summary {\n  cursor: pointer;\n  color: var(--xz-blue);\n  font-weight: 800;\n}\n.xz-wp-product-page details p {\n  margin-top: 10px;\n  margin-bottom: 0;\n}\n.xz-wp-product-page .xz-cta {\n  background: var(--xz-blue);\n  color: var(--xz-white);\n  border-radius: 8px;\n  padding: 30px;\n}\n.xz-wp-product-page .xz-cta h2,\n.xz-wp-product-page .xz-cta p {\n  color: var(--xz-white);\n}\n.xz-wp-product-page .xz-cta a {\n  color: #ffffff;\n  text-decoration: underline;\n}\n@media (max-width: 900px) {\n  .xz-wp-product-page .xz-hero-grid,\n  .xz-wp-product-page .xz-grid-2 {\n    grid-template-columns: 1fr;\n  }\n  .xz-wp-product-page .xz-specs {\n    grid-template-columns: repeat(2, 1fr);\n  }\n  .xz-wp-product-page .xz-apps {\n    grid-template-columns: repeat(2, 1fr);\n  }\n  .xz-wp-product-page h1 {\n    font-size: 34px;\n  }\n}\n@media (max-width: 620px) {\n  .xz-wp-product-page .xz-wrap {\n    padding: 0 16px;\n  }\n  .xz-wp-product-page .xz-hero {\n    padding: 38px 0;\n  }\n  .xz-wp-product-page h1 {\n    font-size: 29px;\n  }\n  .xz-wp-product-page h2 {\n    font-size: 24px;\n  }\n  .xz-wp-product-page .xz-specs,\n  .xz-wp-product-page .xz-apps {\n    grid-template-columns: 1fr;\n  }\n  .xz-wp-product-page .xz-cta {\n    padding: 24px;\n  }\n}\n<\/style>\n\n<article class=\"xz-wp-product-page\" itemscope itemtype=\"https:\/\/schema.org\/Product\">\n  <section class=\"xz-hero\">\n    <div class=\"xz-wrap xz-hero-grid\">\n      <div>\n        <span class=\"xz-eyebrow\">Wholesale Carbon Steel Screw Supply<\/span>\n        <h1 itemprop=\"name\">10B21 carbon steel screws wholesale supplier<\/h1>\n        <p itemprop=\"description\">XZ Fastener supplies 10B21 carbon steel screws for distributors, hardware brands, equipment manufacturers, and project buyers that need stable bulk supply with controlled forming, heat treatment, finish, packing, and inspection requirements. 10B21 boron-treated carbon steel is commonly specified for self-tapping screws, machine screws, SEMS screws, and thread-forming screws that need better hardenability than ordinary low carbon steel. Products can be supplied according to DIN, ISO, ANSI, JIS, GB, or buyer drawings. Buyers can review related <a href=\"https:\/\/xzfastener.com\/home\/products\/\">fastener products<\/a> before sending a wholesale size list.<\/p>\n        <div class=\"xz-hero-actions\">\n          <a class=\"xz-btn\" href=\"#quotation\">Prepare Inquiry Details<\/a>\n          <a class=\"xz-btn xz-btn-secondary\" href=\"#specifications\">View Specifications<\/a>\n        <\/div>\n      <\/div>\n      <div class=\"xz-hero-media\">\n        <img decoding=\"async\" src=\"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/05\/H6d9775107ee443b89796de5799d4d49dq.jpg\" alt=\"10B21 carbon steel screws for wholesale supply\" loading=\"lazy\">\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <h2>Quick Specs<\/h2>\n      <div class=\"xz-specs\">\n        <div class=\"xz-spec\">\n          <strong>Standard<\/strong>\n          DIN, ISO, ANSI, JIS, GB, and drawing-based screws can be reviewed according to order requirement.\n        <\/div>\n        <div class=\"xz-spec\">\n          <strong>Strength<\/strong>\n          Case hardened or heat treated screw grades can be supplied after technical confirmation.\n        <\/div>\n        <div class=\"xz-spec\">\n          <strong>Material<\/strong>\n          10B21 boron-treated carbon steel, with equivalent material reviewed by composition and performance.\n        <\/div>\n        <div class=\"xz-spec\">\n          <strong>Finish<\/strong>\n          Zinc plated, black oxide, phosphate, nickel plated, plain oil, zinc nickel, and other finishes available upon request.\n        <\/div>\n        <div class=\"xz-spec\">\n          <strong>Application<\/strong>\n          Sheet metal assembly, machinery, electrical cabinets, automotive parts, furniture hardware, and appliance production.\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap xz-grid-2\">\n      <div class=\"xz-card\">\n        <h2>What Buyers Should Know Before Sourcing 10B21 Carbon Steel Screws<\/h2>\n        <p>Wholesale buyers often purchase multiple screw sizes, finishes, and packing formats in one order. Before sourcing 10B21 carbon steel screws, confirm head style, drive recess, thread form, point style, heat treatment, hardness range, coating thickness, corrosion requirement, carton labels, and pallet packing. These details affect tooling, production planning, batch separation, and final cost.<\/p>\n        <p>For special heads, non-standard points, washer assemblies, shoulder sections, under-head serrations, or controlled recess depth, XZ Fastener can review <a href=\"https:\/\/xzfastener.com\/home\/customized-service\/\">custom fasteners<\/a> according to drawings, samples, or clear dimensional specifications.<\/p>\n      <\/div>\n      <div class=\"xz-card\">\n        <h2>Common Purchasing Descriptions<\/h2>\n        <p>Many buyers combine screw orders with related bolt items for one stock program, including <a href=\"https:\/\/xzfastener.com\/din-933-full-thread-hex-bolts-manufacturer\/\">DIN 933 full thread hex bolts<\/a>, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts.<\/p>\n        <ul class=\"xz-list\">\n          <li>10B21 carbon steel self-tapping screws, case hardened, zinc plated finish, wholesale carton packing.<\/li>\n          <li>10B21 pan head machine screws with Phillips or Pozi drive, packed by size and item code.<\/li>\n          <li>Carbon steel SEMS screws with captive washer for appliance or electrical cabinet assembly.<\/li>\n          <li>10B21 countersunk screws for metal assembly, black oxide or zinc plated finish.<\/li>\n          <li>Thread forming screws with specified hardness range and coating thickness.<\/li>\n          <li>Drawing-based 10B21 screws with special point, recess, head marking, or distributor label.<\/li>\n        <\/ul>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <div class=\"xz-card\">\n        <h2>Machine Screw Style Reference<\/h2>\n        <p>When checking head style and collar design, buyers can compare dimensions with XZ Fastener&#8217;s <a href=\"https:\/\/xzfastener.com\/products\/din-967-stainless-steel-cross-recessed-pan-head-machine-screws-with-collar\/\">machine screw product example<\/a>, then send the required carbon steel material, finish, hardness, quantity, label format, and packing details for wholesale review.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\" id=\"specifications\">\n    <div class=\"xz-wrap\">\n      <h2>Detailed Specifications Table<\/h2>\n      <div class=\"xz-table-wrap\">\n        <table>\n          <thead>\n            <tr>\n              <th>Item<\/th>\n              <th>Available Options<\/th>\n              <th>Wholesale Buyer Notes<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td>Product Type<\/td>\n              <td>Machine screws, self-tapping screws, thread forming screws, SEMS screws, countersunk screws, pan head screws, special screws<\/td>\n              <td>Separate each screw type and packing format in the inquiry for faster checking.<\/td>\n            <\/tr>\n            <tr>\n              <td>Material<\/td>\n              <td>10B21 carbon steel, boron-treated steel, alternative carbon steel grades available upon request<\/td>\n              <td>Material equivalence should be confirmed by chemical composition and mechanical requirement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Standard<\/td>\n              <td>DIN, ISO, ANSI, JIS, GB, or buyer drawing<\/td>\n              <td>State the standard revision when the project or customer specification controls it.<\/td>\n            <\/tr>\n            <tr>\n              <td>Head Style<\/td>\n              <td>Pan, flat, countersunk, truss, wafer, hex washer, flange, collar, and custom heads<\/td>\n              <td>Head diameter, height, recess depth, and under-head geometry should be defined.<\/td>\n            <\/tr>\n            <tr>\n              <td>Drive<\/td>\n              <td>Phillips, Pozi, slotted, hex socket, Torx, combination drive, and special recess<\/td>\n              <td>Drive gauge or bit fit requirement should be confirmed for automated assembly.<\/td>\n            <\/tr>\n            <tr>\n              <td>Thread and Point<\/td>\n              <td>Metric machine thread, tapping thread, thread forming profile, Type A, AB, B, blunt, drill point<\/td>\n              <td>Point style should match the mating sheet, pilot hole, plastic component, or pre-threaded part.<\/td>\n            <\/tr>\n            <tr>\n              <td>Heat Treatment<\/td>\n              <td>Case hardening, carbonitriding, tempering, or hardness range according to order requirement<\/td>\n              <td>Surface hardness, core hardness, and case depth should be specified when critical.<\/td>\n            <\/tr>\n            <tr>\n              <td>Surface Finish<\/td>\n              <td>Zinc plated, black oxide, phosphate, nickel plated, zinc nickel, plain oil, mechanical plating<\/td>\n              <td>Different finishes can be packed separately according to order requirement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Inspection<\/td>\n              <td>Dimension, thread, drive fit, hardness, case depth, coating thickness, salt spray, visual check<\/td>\n              <td>Inspection reports or third-party checks should be confirmed before order placement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Packing<\/td>\n              <td>Bulk cartons, small boxes, poly bags, pallets, item labels, barcode labels, mixed-size packing<\/td>\n              <td>Provide carton weight, label format, barcode, pallet requirement, and shipping marks if needed.<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <div class=\"xz-note\">\n        If the screw will be used in sheet metal, cast parts, plastic, or pre-threaded holes, buyers can review XZ Fastener&#8217;s guide on <a href=\"https:\/\/xzfastener.com\/how-to-choose-fasteners-based-on-load-material-and-working-conditions\/\">choosing fasteners by load and working conditions<\/a> before finalizing the material and point style.\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap xz-grid-2\">\n      <div class=\"xz-card\">\n        <h2>Material and Grade Explanation<\/h2>\n        <p>10B21 is a boron-treated carbon steel often used for screws that need case hardening and better hardenability than common low carbon steel. The material can support cold forming, thread rolling, point forming, and heat treatment for self-tapping and thread-forming applications when the process is properly controlled.<\/p>\n        <p>Wholesale buyers should not assume every carbon steel screw grade is interchangeable. If the order requires 10B21, provide the material standard, hardness range, case depth, torsion requirement, and any restrictions on alternative grades.<\/p>\n      <\/div>\n      <div class=\"xz-card\">\n        <h2>Surface Finish Selection Guide<\/h2>\n        <ul class=\"xz-list\">\n          <li><strong>Zinc plated:<\/strong> common for general assembly screws requiring clean appearance and moderate corrosion resistance.<\/li>\n          <li><strong>Black oxide:<\/strong> suitable for indoor machinery screws where dark appearance and oil protection are acceptable.<\/li>\n          <li><strong>Phosphate:<\/strong> often selected for oil retention, controlled friction, or paint adhesion needs.<\/li>\n          <li><strong>Nickel plated:<\/strong> used when appearance and surface cleanliness are important for visible parts.<\/li>\n          <li><strong>Zinc nickel:<\/strong> considered when higher corrosion performance is required for automotive or equipment applications.<\/li>\n          <li><strong>Plain oil:<\/strong> used for short-term protection or parts that will receive further processing after delivery.<\/li>\n        <\/ul>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <h2>Manufacturing and Quality Control<\/h2>\n      <div class=\"xz-grid-2\">\n        <div class=\"xz-card\">\n          <h3>Production Review<\/h3>\n          <p>Wholesale production planning covers wire material confirmation, heading, recess forming, thread rolling, point forming, heat treatment, surface finishing, inspection, batch separation, and packing. For 10B21 screws, forming quality and heat treatment control are important because they affect drive strength, thread performance, and assembly reliability.<\/p>\n          <p>For material traceability and stable forming performance, buyers can discuss <a href=\"https:\/\/xzfastener.com\/raw-material-inspection-for-fastener-manufacturing\/\">raw material inspection<\/a>, wire diameter checks, and batch documentation before production starts.<\/p>\n        <\/div>\n        <div class=\"xz-card\">\n          <h3>Inspection Points<\/h3>\n          <p>Common checks include head dimensions, recess depth, drive fit, thread gauge, point geometry, hardness, case depth, coating thickness, salt spray when required, surface appearance, quantity, packing label, carton weight, and pallet condition before shipment.<\/p>\n          <p>Inspection content can be adjusted according to product risk, assembly method, packing format, and buyer requirements.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <h2>Applications<\/h2>\n      <div class=\"xz-apps\">\n        <div class=\"xz-app\">\n          <h3>Sheet Metal Assembly<\/h3>\n          <p>Used for tapping and thread-forming applications in brackets, panels, housings, and equipment covers.<\/p>\n        <\/div>\n        <div class=\"xz-app\">\n          <h3>Appliance Production<\/h3>\n          <p>Suitable for assembly lines that require stable drive fit, repeatable threads, and consistent plating appearance.<\/p>\n        <\/div>\n        <div class=\"xz-app\">\n          <h3>Automotive Components<\/h3>\n          <p>Applied in brackets, interior parts, electrical modules, and hardware assemblies where coating and hardness are controlled.<\/p>\n        <\/div>\n        <div class=\"xz-app\">\n          <h3>Electrical Cabinets<\/h3>\n          <p>Used for panels, rails, boxes, and enclosure assembly with zinc plated or black finish options.<\/p>\n        <\/div>\n        <div class=\"xz-app\">\n          <h3>Furniture Hardware<\/h3>\n          <p>Supplied for hinges, brackets, metal frames, and hardware kits requiring clean packing and item labels.<\/p>\n        <\/div>\n        <div class=\"xz-app\">\n          <h3>Distributor Stock<\/h3>\n          <p>Used for multi-size screw inventory programs, repair kits, and replacement parts for industrial maintenance.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\" id=\"quotation\">\n    <div class=\"xz-wrap xz-grid-2\">\n      <div class=\"xz-card\">\n        <h2>How to Get a Faster Quotation<\/h2>\n        <p>A complete wholesale inquiry helps XZ Fastener check material, tooling, heat treatment, finish, inspection, packing, and shipping details without repeated clarification. For 10B21 carbon steel screws, head style, drive, point, hardness, and finish should be clearly listed.<\/p>\n        <ul class=\"xz-list\">\n          <li>Send size list with diameter, length, thread type, head style, drive, and point style.<\/li>\n          <li>Confirm material grade, heat treatment, surface hardness, core hardness, and case depth if required.<\/li>\n          <li>Attach drawings for special heads, non-standard recess, SEMS assemblies, or controlled tolerances.<\/li>\n          <li>State finish, salt spray requirement, quantity, packaging method, label format, and destination.<\/li>\n          <li>List inspection requirements, reports, or third-party checking before quotation.<\/li>\n        <\/ul>\n      <\/div>\n      <div class=\"xz-card\">\n        <h2>Wholesale Packing and Delivery Planning<\/h2>\n        <p>Bulk screw shipments may require small boxes, poly bags, carton labels, barcode labels, item-code labels, pallet packing, or mixed-size packing. Buyers should confirm carton weight limits, pallet rules, shipping marks, and whether each finish or size must be packed separately.<\/p>\n        <p>For shipment preparation, buyers can review XZ Fastener&#8217;s guide to <a href=\"https:\/\/xzfastener.com\/fastener-shipping-documents-invoice-packing-list-b-l-and-co-explained\/\">shipping documents<\/a> and send the required invoice description, packing list format, and destination details before delivery planning.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <h2>FAQ<\/h2>\n      <details>\n        <summary>Can XZ Fastener supply 10B21 carbon steel screws for wholesale orders?<\/summary>\n        <p>Yes. Wholesale orders can be reviewed according to size list, standards, quantities, finishes, packing formats, labels, and inspection requirements. Mixed sizes should be separated by line item.<\/p>\n      <\/details>\n      <details>\n        <summary>Why is 10B21 used for self-tapping or thread-forming screws?<\/summary>\n        <p>10B21 is often selected because the boron-treated carbon steel can provide better hardenability after heat treatment than ordinary low carbon steel, which helps support tapping and thread-forming performance.<\/p>\n      <\/details>\n      <details>\n        <summary>Can 10B21 screws be supplied with distributor labels?<\/summary>\n        <p>Distributor labels, item codes, barcode labels, carton labels, and pallet labels can be discussed according to order requirement. Buyers should provide label content before packing confirmation.<\/p>\n      <\/details>\n      <details>\n        <summary>What hardness information should be provided for 10B21 screws?<\/summary>\n        <p>For heat treated screws, provide surface hardness, core hardness, case depth, torsion requirement, or the applicable standard. These details help control screw performance and reduce assembly risk.<\/p>\n      <\/details>\n      <details>\n        <summary>Can different finishes be packed in one wholesale shipment?<\/summary>\n        <p>Different finishes such as zinc plated, black oxide, phosphate, nickel plated, or zinc nickel can be reviewed in one order. Separate packing by finish is recommended for clearer receiving and inventory control.<\/p>\n      <\/details>\n      <details>\n        <summary>What information is needed for a wholesale quotation?<\/summary>\n        <p>Please send screw type, size list, head style, drive, thread, point, material, heat treatment, finish, quantity, packaging, inspection requirements, destination, and any required shipping documents.<\/p>\n      <\/details>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-section\">\n    <div class=\"xz-wrap\">\n      <div class=\"xz-cta\">\n        <h2>Send Your 10B21 Carbon Steel Screw Wholesale Inquiry<\/h2>\n        <p>For a faster quotation, send your size list, finish, quantity, packaging, and inspection requirements. Drawings, samples, head style, drive type, point style, hardness requirement, distributor label details, and destination help the supply team confirm production more accurately. To submit files and purchasing details, <a href=\"https:\/\/xzfastener.com\/home\/contact-us\/\">contact XZ Fastener<\/a>.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <script type=\"application\/ld+json\">\n  {\n    \"@context\": \"https:\/\/schema.org\",\n    \"@graph\": [\n      {\n        \"@type\": \"Organization\",\n        \"@id\": \"https:\/\/xzfastener.com\/#organization\",\n        \"name\": \"XZ Fastener\",\n        \"url\": \"https:\/\/xzfastener.com\/\",\n        \"logo\": \"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/04\/cropped-XZ.png\",\n        \"contactPoint\": {\n          \"@type\": \"ContactPoint\",\n          \"contactType\": \"sales\",\n          \"url\": \"https:\/\/xzfastener.com\/home\/contact-us\/\"\n        }\n      },\n      {\n        \"@type\": \"BreadcrumbList\",\n        \"@id\": \"https:\/\/xzfastener.com\/10b21-carbon-steel-screws-wholesale-supplier\/#breadcrumb\",\n        \"itemListElement\": [\n          {\n            \"@type\": \"ListItem\",\n            \"position\": 1,\n            \"name\": \"Home\",\n            \"item\": \"https:\/\/xzfastener.com\/\"\n          },\n          {\n            \"@type\": \"ListItem\",\n            \"position\": 2,\n            \"name\": \"Products\",\n            \"item\": \"https:\/\/xzfastener.com\/home\/products\/\"\n          },\n          {\n            \"@type\": \"ListItem\",\n            \"position\": 3,\n            \"name\": \"10B21 Carbon Steel Screws Wholesale Supplier\",\n            \"item\": \"https:\/\/xzfastener.com\/10b21-carbon-steel-screws-wholesale-supplier\/\"\n          }\n        ]\n      },\n      {\n        \"@type\": \"Product\",\n        \"@id\": \"https:\/\/xzfastener.com\/10b21-carbon-steel-screws-wholesale-supplier\/#product\",\n        \"name\": \"10B21 carbon steel screws\",\n        \"description\": \"10B21 carbon steel screws supplied by XZ Fastener for wholesale orders, including self-tapping screws, machine screws, SEMS screws, thread-forming screws, and drawing-based screws with material, heat treatment, finish, packing, and inspection requirements reviewed according to order requirement.\",\n        \"image\": \"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/05\/H6d9775107ee443b89796de5799d4d49dq.jpg\",\n        \"brand\": {\n          \"@type\": \"Brand\",\n          \"name\": \"XZ Fastener\"\n        },\n        \"manufacturer\": {\n          \"@id\": \"https:\/\/xzfastener.com\/#organization\"\n        },\n        \"material\": \"10B21 carbon steel\",\n        \"category\": \"Carbon steel screws\",\n        \"url\": \"https:\/\/xzfastener.com\/10b21-carbon-steel-screws-wholesale-supplier\/\"\n      },\n      {\n        \"@type\": \"FAQPage\",\n        \"@id\": \"https:\/\/xzfastener.com\/10b21-carbon-steel-screws-wholesale-supplier\/#faq\",\n        \"mainEntity\": [\n          {\n            \"@type\": \"Question\",\n            \"name\": \"Can XZ Fastener supply 10B21 carbon steel screws for wholesale orders?\",\n            \"acceptedAnswer\": {\n              \"@type\": \"Answer\",\n              \"text\": \"Yes. 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