{"id":7550,"date":"2025-04-17T10:47:38","date_gmt":"2025-04-17T02:47:38","guid":{"rendered":"https:\/\/xzfastener.com\/?p=7550"},"modified":"2026-06-24T10:51:22","modified_gmt":"2026-06-24T02:51:22","slug":"din-7991-countersunk-socket-head-screws-factory","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/ru\/din-7991-countersunk-socket-head-screws-factory\/","title":{"rendered":"DIN 7991 countersunk socket head screws factory"},"content":{"rendered":"\n<style>\n.xz-wp-product-page{--xz-blue:#0b2f57;--xz-blue-2:#123f70;--xz-accent:#1f6fb2;--xz-bg:#f3f7fb;--xz-line:#d8e3ee;--xz-text:#172334;--xz-muted:#526173;--xz-white:#fff;font-family:Arial,Helvetica,sans-serif;color:var(--xz-text);background:var(--xz-white);line-height:1.65}\n.xz-wp-product-page *{box-sizing:border-box}\n.xz-wp-product-page a{color:#0d5fa8;text-decoration:none;font-weight:700}\n.xz-wp-product-page a:hover{text-decoration:underline}\n.xz-wp-product-page .xz-wrap{max-width:1180px;margin:0 auto;padding:0 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img{width:100%;height:auto;border-radius:8px;border:1px solid var(--xz-line);background:#eef4fa}\n.xz-wp-product-page details{border:1px solid var(--xz-line);border-radius:8px;padding:15px 18px;margin:10px 0;background:#fff}\n.xz-wp-product-page summary{cursor:pointer;font-weight:700;color:var(--xz-blue)}\n.xz-wp-product-page details p{margin-top:10px}\n.xz-wp-product-page .xz-cta{background:var(--xz-blue);color:#fff;border-bottom:0}\n.xz-wp-product-page .xz-cta h2{color:#fff}\n.xz-wp-product-page .xz-cta p{color:#e6eef7}\n.xz-wp-product-page .xz-cta-box{background:#123f70;border:1px solid #7faad2;border-radius:8px;padding:24px}\n@media(max-width:860px){.xz-wp-product-page .xz-hero-grid,.xz-wp-product-page .xz-grid-2,.xz-wp-product-page .xz-media{grid-template-columns:1fr}.xz-wp-product-page .xz-specs,.xz-wp-product-page .xz-finish-grid{grid-template-columns:1fr 1fr}.xz-wp-product-page h1{font-size:34px}}\n@media(max-width:560px){.xz-wp-product-page .xz-specs,.xz-wp-product-page .xz-finish-grid{grid-template-columns:1fr}.xz-wp-product-page .xz-hero{padding:38px 0}.xz-wp-product-page h1{font-size:29px}.xz-wp-product-page .xz-lead{font-size:16px}}\n<\/style>\n\n<article class=\"xz-wp-product-page\">\n  <section class=\"xz-hero\">\n    <div class=\"xz-wrap\">\n      <div class=\"xz-hero-grid\">\n        <div>\n          <h1>DIN 7991 countersunk socket head screws factory<\/h1>\n          <p class=\"xz-lead\">XZ Fastener manufactures DIN 7991 countersunk socket head screws for buyers who need a flush surface, internal hex drive, and controlled metric threading for machinery, equipment panels, fixtures, furniture hardware, and OEM assemblies. These flat head socket screws can be supplied in alloy steel, carbon steel, stainless steel 304, and stainless steel 316, with finish and packing arranged according to order requirement. For projects that include multiple screw, bolt, nut, and washer types, buyers can review related <a href=\"https:\/\/xzfastener.com\/home\/products\/\">fastener products<\/a> and send a combined size list for practical factory quotation.<\/p>\n          <div class=\"xz-actions\">\n            <a class=\"xz-btn\" href=\"https:\/\/xzfastener.com\/request-quote\/\">Request a Quote<\/a>\n            <a class=\"xz-btn xz-secondary\" href=\"https:\/\/xzfastener.com\/home\/contact-us\/\">Contact XZ Fastener<\/a>\n          <\/div>\n          <p class=\"xz-hero-note\">Factory supply can be arranged by standard, size, material, grade, surface finish, packing method, and inspection requirement.<\/p>\n        <\/div>\n        <div class=\"xz-hero-card\">\n          <img decoding=\"async\" src=\"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/05\/Image-May-14-2026-05_43_11-PM.png\" alt=\"DIN 7991 countersunk socket head screws factory supply\" loading=\"eager\">\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>Quick Specs<\/h2>\n      <div class=\"xz-specs\">\n        <div class=\"xz-spec\"><strong>Standard<\/strong>DIN 7991, ISO 10642 reference available upon request<\/div>\n        <div class=\"xz-spec\"><strong>Strength<\/strong>8.8, 10.9, 12.9, A2-70, A4-70, A4-80 can be supplied<\/div>\n        <div class=\"xz-spec\"><strong>Material<\/strong>Alloy steel, carbon steel, stainless steel 304, stainless steel 316<\/div>\n        <div class=\"xz-spec\"><strong>Finish<\/strong>Black oxide, zinc plated, nickel plated, phosphate, Dacromet, Geomet, passivated stainless<\/div>\n        <div class=\"xz-spec\"><strong>Application<\/strong>Flush assemblies, machinery guards, fixtures, panels, molds, furniture connectors, OEM equipment<\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>What Buyers Should Know Before Sourcing DIN 7991 Countersunk Socket Head Screws<\/h2>\n      <div class=\"xz-grid-2\">\n        <div class=\"xz-panel\">\n          <h3>Flush Fit Requires More Detail<\/h3>\n          <p>DIN 7991 countersunk socket head screws are selected when the screw head must sit flush with the assembly surface. Before production, buyers should confirm countersink angle, head diameter, head height, socket size, thread pitch, length measurement method, and mating hole preparation.<\/p>\n          <p>Because countersunk head geometry affects seating and appearance, buyers should avoid replacing them with pan head, button head, or standard socket cap screws without checking the assembly drawing.<\/p>\n        <\/div>\n        <div class=\"xz-panel\">\n          <h3>Match Drive, Torque, and Material<\/h3>\n          <p>Internal hex drive screws offer clean appearance and compact tool access, but the tightening method should match screw grade, socket size, and base material. The guide on <a href=\"https:\/\/xzfastener.com\/screw-drive-types-how-to-choose-the-right-drive-for-assembly\/\">screw drive types<\/a> can help purchasing and engineering teams compare socket, Phillips, Torx, slotted, and other drive options.<\/p>\n          <p>For OEM equipment, send the drawing or sample if the countersink must align with a specific machined surface.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>Common Purchasing Descriptions<\/h2>\n      <p>DIN 7991 countersunk socket head screws are often listed under several purchasing names. To reduce confusion, include the standard number, material, grade, finish, and length in the RFQ.<\/p>\n      <ul>\n        <li>DIN 7991 countersunk socket head screws, alloy steel 10.9 or 12.9, black oxide finish, metric coarse thread.<\/li>\n        <li>DIN 7991 flat head socket screws, stainless steel 304 or 316, plain or passivated finish, full thread according to size.<\/li>\n        <li>Hex socket countersunk head screws, M3 to M16, zinc plated or nickel plated, bulk carton packing.<\/li>\n        <li>DIN 7991 countersunk screws ordered with DIN 933 full thread hex bolts for machinery assembly kits.<\/li>\n        <li>Grade 8.8 carbon steel hex bolts, metric hex head bolts, and countersunk socket screws for equipment manufacturing.<\/li>\n        <li>Zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts supplied with matching nuts and washers for combined project purchasing.<\/li>\n      <\/ul>\n    <\/div>\n  <\/section>\n\n  <section>\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>Specification Item<\/th>\n              <th>Available Options<\/th>\n              <th>Buyer Notes<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td>Product Type<\/td>\n              <td>DIN 7991 countersunk socket head screws, flat head socket screws, hex socket countersunk screws<\/td>\n              <td>Confirm DIN 7991 or ISO 10642 reference when the drawing requires a specific head profile.<\/td>\n            <\/tr>\n            <tr>\n              <td>Size Range<\/td>\n              <td>Common metric sizes include M3, M4, M5, M6, M8, M10, M12, M16; other sizes can be discussed<\/td>\n              <td>Send diameter x length and clarify how length is measured for countersunk screws.<\/td>\n            <\/tr>\n            <tr>\n              <td>Thread<\/td>\n              <td>Metric coarse thread; metric fine thread available upon request<\/td>\n              <td>Thread pitch and tolerance should match the tapped hole or nut requirement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Head Style<\/td>\n              <td>Countersunk flat head with internal hex socket<\/td>\n              <td>Check countersink angle, head diameter, and seating depth for flush assemblies.<\/td>\n            <\/tr>\n            <tr>\n              <td>Material<\/td>\n              <td>Alloy steel, carbon steel, stainless steel 304, stainless steel 316<\/td>\n              <td>Material should be chosen according to strength, corrosion environment, appearance, and cost target.<\/td>\n            <\/tr>\n            <tr>\n              <td>Strength Grade<\/td>\n              <td>8.8, 10.9, 12.9, A2-70, A4-70, A4-80<\/td>\n              <td>High-strength grades should be matched with the assembly design and tightening method.<\/td>\n            <\/tr>\n            <tr>\n              <td>Surface Finish<\/td>\n              <td>Black oxide, zinc plated, yellow zinc, nickel plated, phosphate, Dacromet, Geomet, plain stainless, passivation<\/td>\n              <td>Coating thickness can affect thread fit and countersunk seating; samples can be reviewed when required.<\/td>\n            <\/tr>\n            <tr>\n              <td>Packaging<\/td>\n              <td>Bulk carton, small box, plastic bag, customer label, barcode label, pallet packing<\/td>\n              <td>Carton weight, box quantity, label content, and pallet layout should be confirmed before quotation.<\/td>\n            <\/tr>\n            <tr>\n              <td>Inspection<\/td>\n              <td>Dimension check, thread gauge check, socket size check, head seating check, surface inspection, hardness test<\/td>\n              <td>Inspection report can be supplied according to order requirement.<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>Material and Grade Explanation<\/h2>\n      <div class=\"xz-grid-2\">\n        <div>\n          <p><strong>Alloy steel DIN 7991 screws<\/strong> are commonly selected for grade 10.9 or 12.9 assemblies where strength and compact appearance are important. They are suitable for machinery, molds, fixtures, automation equipment, and structural subassemblies where the head must not project above the surface.<\/p>\n          <p><strong>Carbon steel options<\/strong> can be supplied for cost-sensitive assemblies where moderate strength and coating protection are sufficient. Buyers should confirm whether zinc plating, black oxide, phosphate, or another coating is required.<\/p>\n        <\/div>\n        <div>\n          <p><strong>Stainless steel 304 and 316<\/strong> are used when corrosion resistance, clean appearance, or outdoor exposure is important. Stainless 316 is preferred for stronger corrosion resistance in humid, marine-related, or chemical environments.<\/p>\n          <p>For buyers comparing screw families, the <a href=\"https:\/\/xzfastener.com\/industry-guide-to-screw-selection-for-oem-and-equipment-manufacturing\/\">industry guide to screw selection<\/a> can help identify when countersunk socket screws are better than pan head, button head, self-tapping, or machine screw alternatives.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>Surface Finish Selection Guide<\/h2>\n      <div class=\"xz-finish-grid\">\n        <div class=\"xz-finish\">\n          <h3>Black Oxide<\/h3>\n          <p>Common for alloy steel countersunk socket screws used in indoor machinery, molds, and tooling. Oil treatment may be requested for storage protection.<\/p>\n        <\/div>\n        <div class=\"xz-finish\">\n          <h3>Zinc Plated<\/h3>\n          <p>Suitable for general industrial use where a bright appearance and moderate corrosion protection are required.<\/p>\n        <\/div>\n        <div class=\"xz-finish\">\n          <h3>Nickel Plated<\/h3>\n          <p>Often selected where appearance, surface cleanliness, or special assembly preference matters.<\/p>\n        <\/div>\n        <div class=\"xz-finish\">\n          <h3>Phosphate<\/h3>\n          <p>Used for darker appearance, oil retention, or controlled friction requirements in mechanical assemblies.<\/p>\n        <\/div>\n        <div class=\"xz-finish\">\n          <h3>Dacromet and Geomet<\/h3>\n          <p>Available upon request for higher corrosion protection needs. Buyers should define coating performance and thread fit expectations before order confirmation.<\/p>\n        <\/div>\n        <div class=\"xz-finish\">\n          <h3>Finish Comparison<\/h3>\n          <p>The <a href=\"https:\/\/xzfastener.com\/fastener-coating-guide-zinc-hdg-dacromet-ptfe-and-more\/\">fastener coating guide<\/a> can help buyers compare zinc, black oxide, Dacromet, Geomet, PTFE, and other surface treatments.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <div class=\"xz-media\">\n        <div>\n          <img decoding=\"async\" src=\"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/03\/jiance64.jpg\" alt=\"Countersunk socket head screw inspection and quality control\" loading=\"lazy\">\n        <\/div>\n        <div>\n          <h2>Manufacturing and Quality Control<\/h2>\n          <p>DIN 7991 countersunk socket head screws are typically produced through wire preparation, cold heading or forming, socket forming, thread rolling, heat treatment when required, surface finishing, sorting, and packing. Countersunk head forming must be controlled because head angle and head diameter affect flush seating.<\/p>\n          <p>Inspection may include head diameter, head height, countersink profile, socket size, overall length, thread length, thread pitch, thread fit, surface condition, and hardness for heat-treated steel parts. The <a href=\"https:\/\/xzfastener.com\/thread-inspection-methods-for-fastener-quality-control\/\">thread inspection methods guide<\/a> explains practical checks buyers can request for threaded fasteners.<\/p>\n          <p>For factory orders, XZ Fastener can provide packing photos, label confirmation, and inspection records according to order requirement.<\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>Applications<\/h2>\n      <div class=\"xz-grid-2\">\n        <div class=\"xz-panel\">\n          <h3>Industrial Assemblies<\/h3>\n          <ul>\n            <li>Machine guards, panels, covers, plates, brackets, and equipment housings.<\/li>\n            <li>Automation fixtures, tooling plates, mold components, and CNC-related assemblies.<\/li>\n            <li>Furniture connectors, display hardware, metal frames, and flush surface structures.<\/li>\n            <li>Electrical enclosures, access covers, guide rails, and compact machinery parts.<\/li>\n          <\/ul>\n        <\/div>\n        <div class=\"xz-panel\">\n          <h3>Procurement Programs<\/h3>\n          <ul>\n            <li>OEM production batches with repeated screw sizes and controlled packaging.<\/li>\n            <li>Distributor stock orders covering common M3 to M16 countersunk socket screws.<\/li>\n            <li>Mixed shipments with socket screws, machine screws, hex bolts, nuts, and washers.<\/li>\n            <li>Private label boxes, barcode labels, and pallet packing available upon request.<\/li>\n          <\/ul>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>How to Get a Faster Quotation<\/h2>\n      <p>Send diameter, length, thread pitch, material, strength grade, finish, quantity, packaging method, inspection requirements, and destination details. If the screw must sit perfectly flush, include the assembly drawing, countersink angle, countersink diameter, and any special head tolerance requirement.<\/p>\n      <p>For measuring and confirming screw dimensions, the <a href=\"https:\/\/xzfastener.com\/fastener-length-guide-measuring-bolts-screws-studs-and-rods\/\">fastener length guide<\/a> helps buyers clarify how length is measured for screws, bolts, studs, and rods. For complete RFQ preparation, buyers can also use the <a href=\"https:\/\/xzfastener.com\/what-information-chinese-fastener-suppliers-need-for-accurate-quotes\/\">accurate quote information guide<\/a>.<\/p>\n    <\/div>\n  <\/section>\n\n  <section>\n    <div class=\"xz-wrap\">\n      <h2>FAQ<\/h2>\n      <details>\n        <summary>Can XZ Fastener produce DIN 7991 countersunk socket head screws as a factory order?<\/summary>\n        <p>Yes. DIN 7991 countersunk socket head screws can be supplied for factory orders, OEM projects, distributor stock, and equipment manufacturing. Buyers should provide size, material, grade, finish, quantity, packaging, and inspection requirements.<\/p>\n      <\/details>\n      <details>\n        <summary>What is the main difference between DIN 7991 and DIN 912 screws?<\/summary>\n        <p>DIN 7991 screws have a countersunk flat head designed to sit flush with the surface, while DIN 912 screws have a cylindrical socket head. The correct choice depends on head clearance, assembly appearance, and load design.<\/p>\n      <\/details>\n      <details>\n        <summary>Which materials are available for DIN 7991 countersunk socket screws?<\/summary>\n        <p>Common materials include alloy steel, carbon steel, stainless steel 304, and stainless steel 316. Brass and other materials may be discussed when the drawing and application requirements are provided.<\/p>\n      <\/details>\n      <details>\n        <summary>Can you supply black oxide or zinc plated DIN 7991 screws?<\/summary>\n        <p>Yes. Black oxide, zinc plated, yellow zinc, nickel plated, phosphate, Dacromet, Geomet, plain stainless, and passivated stainless finishes can be discussed according to material and order requirement.<\/p>\n      <\/details>\n      <details>\n        <summary>What should buyers check before ordering countersunk screws?<\/summary>\n        <p>Buyers should confirm countersink angle, head diameter, head height, socket size, thread pitch, length measurement method, material, grade, finish, and whether the mating hole is prepared correctly for flush seating.<\/p>\n      <\/details>\n      <details>\n        <summary>Can DIN 7991 screws be packed with buyer labels?<\/summary>\n        <p>Yes. Bulk cartons, small boxes, plastic bags, barcode labels, buyer labels, and pallet marks can be arranged according to order requirement. Label content should be confirmed before packing.<\/p>\n      <\/details>\n    <\/div>\n  <\/section>\n\n  <section class=\"xz-cta\">\n    <div class=\"xz-wrap\">\n      <div class=\"xz-cta-box\">\n        <h2>Send Your DIN 7991 Countersunk Socket Screw Inquiry<\/h2>\n        <p>Send your size list, finish, quantity, packaging method, carton or pallet requirement, and inspection requirements. XZ Fastener can review DIN 7991 countersunk socket head screws, matching washers, nuts, and related fasteners for factory quotation.<\/p>\n        <a class=\"xz-btn\" href=\"https:\/\/xzfastener.com\/home\/contact-us\/\">Contact XZ Fastener<\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n<\/article>\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\/03\/XZ-LOGO%E3%80%90%E9%95%BF%E6%96%B9%E5%BD%A2PNG%E3%80%91.png\"\n    },\n    {\n      \"@type\": \"BreadcrumbList\",\n      \"@id\": \"https:\/\/xzfastener.com\/din-7991-countersunk-socket-head-screws-factory\/#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\": \"Fastener Products\",\n          \"item\": \"https:\/\/xzfastener.com\/home\/products\/\"\n        },\n        {\n          \"@type\": \"ListItem\",\n          \"position\": 3,\n          \"name\": \"DIN 7991 countersunk socket head screws factory\",\n          \"item\": \"https:\/\/xzfastener.com\/din-7991-countersunk-socket-head-screws-factory\/\"\n        }\n      ]\n    },\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/xzfastener.com\/din-7991-countersunk-socket-head-screws-factory\/#product\",\n      \"name\": \"DIN 7991 countersunk socket head screws factory\",\n      \"image\": \"https:\/\/xzfastener.com\/wp-content\/uploads\/2026\/05\/Image-May-14-2026-05_43_11-PM.png\",\n      \"description\": \"DIN 7991 countersunk socket head screws manufactured by XZ Fastener for flush assemblies, machinery, equipment panels, fixtures, furniture hardware, and OEM projects. Options include alloy steel, carbon steel, stainless steel 304, and stainless steel 316 with black oxide, zinc plated, nickel plated, phosphate, Dacromet, Geomet, and passivated stainless finishes.\",\n      \"brand\": {\n        \"@type\": \"Brand\",\n        \"name\": \"XZ Fastener\"\n      },\n      \"manufacturer\": {\n        \"@id\": \"https:\/\/xzfastener.com\/#organization\"\n      },\n      \"material\": \"Alloy steel, carbon steel, stainless steel 304, stainless steel 316\",\n      \"category\": \"Countersunk socket head screws\",\n      \"additionalProperty\": [\n        {\n          \"@type\": \"PropertyValue\",\n          \"name\": \"Standard\",\n          \"value\": \"DIN 7991, ISO 10642 reference available upon request\"\n        },\n        {\n          \"@type\": \"PropertyValue\",\n          \"name\": \"Strength\",\n          \"value\": \"8.8, 10.9, 12.9, A2-70, A4-70, A4-80\"\n        },\n        {\n          \"@type\": \"PropertyValue\",\n          \"name\": \"Finish\",\n          \"value\": \"Black oxide, zinc plated, yellow zinc, nickel plated, phosphate, Dacromet, Geomet, plain stainless, passivation\"\n        },\n        {\n          \"@type\": \"PropertyValue\",\n          \"name\": \"Application\",\n          \"value\": \"Flush assemblies, machinery guards, fixtures, panels, molds, furniture connectors, OEM equipment\"\n        }\n      ]\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/xzfastener.com\/din-7991-countersunk-socket-head-screws-factory\/#faq\",\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can XZ Fastener produce DIN 7991 countersunk socket head screws as a factory order?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. DIN 7991 countersunk socket head screws can be supplied for factory orders, OEM projects, distributor stock, and equipment manufacturing. Buyers should provide size, material, grade, finish, quantity, packaging, and inspection requirements.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What is the main difference between DIN 7991 and DIN 912 screws?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"DIN 7991 screws have a countersunk flat head designed to sit flush with the surface, while DIN 912 screws have a cylindrical socket head. The correct choice depends on head clearance, assembly appearance, and load design.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Which materials are available for DIN 7991 countersunk socket screws?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Common materials include alloy steel, carbon steel, stainless steel 304, and stainless steel 316. Brass and other materials may be discussed when the drawing and application requirements are provided.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can you supply black oxide or zinc plated DIN 7991 screws?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. Black oxide, zinc plated, yellow zinc, nickel plated, phosphate, Dacromet, Geomet, plain stainless, and passivated stainless finishes can be discussed according to material and order requirement.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What should buyers check before ordering countersunk screws?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Buyers should confirm countersink angle, head diameter, head height, socket size, thread pitch, length measurement method, material, grade, finish, and whether the mating hole is prepared correctly for flush seating.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can DIN 7991 screws be packed with buyer labels?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. Bulk cartons, small boxes, plastic bags, barcode labels, buyer labels, and pallet marks can be arranged according to order requirement. Label content should be confirmed before packing.\"\n          }\n        }\n      ]\n    }\n  ]\n}\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>DIN 7991 countersunk socket head screws factory XZ Fastener manufactures DIN 7991 countersunk socket head screws for buyers who need a flush surface, internal hex drive, and controlled metric threading for machinery, equipment panels, fixtures, furniture hardware, and OEM assemblies. These flat head socket screws can be supplied in alloy steel, carbon steel, stainless steel [&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":[110],"tags":[],"class_list":["post-7550","post","type-post","status-publish","format-standard","hentry","category-product-knowledge"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/posts\/7550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/comments?post=7550"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/posts\/7550\/revisions"}],"predecessor-version":[{"id":7551,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/posts\/7550\/revisions\/7551"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/media?parent=7550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/categories?post=7550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/ru\/wp-json\/wp\/v2\/tags?post=7550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}