--- title: "DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt" description: "DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt — Countersunk, Plow & Elevator Bolts. MOQ 50,000 pieces, US$0.006 – 6.00." url: https://engineeringhardware.com/product/din7991-10-9-grade-alloy-steel-black-zinc-plated-countersunk-hex-socket-bolt/ source: Engineering Hardware & Fasteners --- # DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt [![DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt](https://img.engineeringhardware.com/DIN7991-10-9-Grade-Alloy-Steel-Black-Zinc-Plated-Countersunk-Hex-Socket-Bolt.webp)](https://img.engineeringhardware.com/DIN7991-10-9-Grade-Alloy-Steel-Black-Zinc-Plated-Countersunk-Hex-Socket-Bolt.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Countersunk, Plow & Elevator Bolts](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) Updated 2026-11-03 · [Markdown version](https://engineeringhardware.com/product/din7991-10-9-grade-alloy-steel-black-zinc-plated-countersunk-hex-socket-bolt.md) Model no. **OKL-S93** US$0.006 – 6.00 / piece MOQ 50,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Counter Sunk Bolt - **Standard:** DIN, ANSI, GB, JIS, BSW, GOST - **Grade:** 10.9 - **Finish:** Black - **Thread Type:** Machine Thread (Metric/Imperial) - **Surface Finish:** Zinc Plated (Carbon Steel) / Natural (Stainless St - **Diameter Range:** M3-M20 Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20DIN7991%2010.9%20Grade%20Alloy%20Steel%20Black%20Zinc%20Plated%20Countersunk%20Hex%20Socket%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-10-9-grade-alloy-steel-black-zinc-plated-countersunk-hex-socket-bolt%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Customization | Available | | --- | --- | | Material | Carbon Steel | | Type | Countersunk Head | | Model NO. | OKL-S93 | | Connection | Common Bolt | | Head Style | Counter Sunk Bolt | | Standard | DIN, ANSI, GB, JIS, BSW, GOST | | Grade | 10.9 | | Application | Machinery, Chemical Industry, Environmental, Building, Construction Industries, Furniture, Automotive | | Finish | Black | | Product Name | Black Zinc Plated DIN7991 Bolt | | Keywords | DIN7991 Bolt | | Thread Type | Machine Thread (Metric/Imperial) | | Surface Finish | Zinc Plated (Carbon Steel) / Natural (Stainless St | | Diameter Range | M3-M20 | | Length Range | 6mm - 100mm | | Point Style | Flat Point | | Feature | Corrosion Resistant, Anti-Loosening, High Torque T | | Standard Compliance | DIN, ISO, ANSI/ASME, JIS,Custom | | Transport Package | Standard Packaging or Customized | | Specification | Standard Specifications or Customized | | Origin | Zhejiang, China | | HS Code | 7318150000 | | Production Capacity | 300000000PCS/Year | | Package Size | 28.00cm * 18.00cm * 14.00cm | | Package Gross Weight | 20.000kg | | Metric | M3 – M20;Customizable | | Category | [Countersunk, Plow & Elevator Bolts](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) | ## Technical parameters | TECHNICAL PARAMETERS | | | --- | --- | | Product Name | Black Zinc Plated DIN7991 CSK Head Hex Socket Bolt | | Keywords | DIN7991 Bolt | | Material | Alloy Steel (Grade 10.9) | | Head Style | Countersunk (Flat Head, 90°) | | Grade | 10.9 (Tensile Strength: 1000 MPa) | | Thread Type | Full Machine Thread (Metric/Imperial) | | Surface Finish | Black Zinc Plated (Black Oxide Option Available) | | Diameter Range | Metric: M3 – M20;Customizable | | Length Range | 6mm – 100mm (custom non-standard lengths available) | | Point Style | Flat Point | | Feature | Corrosion Resistant, Anti-Loosening, High Torque Transfer | | Application | Industrial Machinery,Construction & Architecture,Marine & Offshore,Automotive & Transportation,etc | | Standard Compliance | DIN,ISO,ANSI/ASME,JIS,Custom | ## Description DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt is part of our countersunk, plow & elevator bolts range (Bolts). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, ANSI, GB, JIS, BSW, GOST - **Material:** Carbon Steel - **Grade:** 10.9 - **Head Style:** Counter Sunk Bolt - **Finish:** Black - **Connection:** Common Bolt - **Product Name:** Black Zinc Plated DIN7991 Bolt Available configurations include material, head style, standard, grade and finish. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 50,000 pieces at US$0.006 – 6.00 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt? The listed minimum order is 50,000 pieces, at US$0.006 – 6.00 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### What are the main specifications of DIN7991 10.9 Grade Alloy Steel Black Zinc Plated Countersunk Hex Socket Bolt? Type: Countersunk Head; Standard: DIN, ANSI, GB, JIS, BSW, GOST; Material: Carbon Steel; Grade: 10.9; Head Style: Counter Sunk Bolt; Finish: Black. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, head style, standard, grade and finish. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other countersunk, plow & elevator bolts are available? The Countersunk, Plow & Elevator Bolts category lists 533 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & 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custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Countersunk, Plow & Elevator Bolts →](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) [![DIN7991 Countersunk Socket Head Screw, Flat Head Allen Bolt, Black Oxide / Stainless Steel](https://img.engineeringhardware.com/DIN7991-Countersunk-Socket-Head-Screw-Flat-Head-Allen-Bolt-Black-Oxide-Stainless-Steel.webp)](https://engineeringhardware.com/product/din7991-countersunk-socket-head-screw-flat-head-allen-bolt-black-oxide-stainless/) Countersunk, Plow & Elevator Bolts ### [DIN7991 Countersunk Socket Head Screw, Flat Head Allen Bolt, Black Oxide / Stainless Steel](https://engineeringhardware.com/product/din7991-countersunk-socket-head-screw-flat-head-allen-bolt-black-oxide-stainless/) Round Head · DIN, ANSI, GB, JIS, BSW **US$0.012**MOQ 1,000 pieces [![Premium Stainless Steel Countersunk Nib Bolts for Marine and Food 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Countersunk, Plow & Elevator Bolts ### [High-Quality Lemken 3014549 Reversible Plow Bolts for Agriculture](https://engineeringhardware.com/product/high-quality-lemken-3014549-reversible-plow-bolts-for-agriculture/) Bolt,Nut · Alloy Steel **US$3.60**MOQ 2,000 pieces **US$0.006 – 6.00**MOQ 50,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20DIN7991%2010.9%20Grade%20Alloy%20Steel%20Black%20Zinc%20Plated%20Countersunk%20Hex%20Socket%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-10-9-grade-alloy-steel-black-zinc-plated-countersunk-hex-socket-bolt%2F)