--- title: "DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8" description: "DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8 — Countersunk & Flat-Head Machine Screws. MOQ 1,000 pieces, US$0.12." url: https://engineeringhardware.com/product/din7991-hexagon-socket-countersunk-head-cap-screws-with-black-surface-treatment-m8/ source: Engineering Hardware & Fasteners --- # DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8 [![DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8](https://img.engineeringhardware.com/DIN7991-Hexagon-Socket-Countersunk-Head-Cap-Screws-with-Black-Surface-Treatment-M8.webp)](https://img.engineeringhardware.com/DIN7991-Hexagon-Socket-Countersunk-Head-Cap-Screws-with-Black-Surface-Treatment-M8.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/din7991-hexagon-socket-countersunk-head-cap-screws-with-black-surface-treatment-m8.md) Model no. **DIN7991** US$0.12 / piece MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Counter Sunk Bolt - **Standard:** DIN, GB, ANSI, JIS, GOST - **Grade:** 4.8,8.8,10.9,12.9 - **Surface Treatment:** According to Requirements - **Thread Type:** Fine / Coarse /Bsw/Bsf/ Unc/Unf - **Package Size:** 10.00cm * 10.00cm * 10.00cm 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%20Hexagon%20Socket%20Countersunk%20Head%20Cap%20Screws%20with%20Black%20Surface%20Treatment%20M8%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hexagon-socket-countersunk-head-cap-screws-with-black-surface-treatment-m8%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. | DIN7991 | | Groove | Hexagon | | Connection | Common Bolt | | Head Style | Counter Sunk Bolt | | Standard | DIN, GB, ANSI, JIS, GOST | | Grade | 4.8,8.8,10.9,12.9 | | Process | Cold Forging,Hot Forging,Machining | | Salt Spray Test | According to Requirements | | Surface Treatment | According to Requirements | | Thread Type | Fine / Coarse /Bsw/Bsf/ Unc/Unf | | Transport Package | Small Box & Bulk & Customizing | | Specification | M3-M24 | | Origin | Ningbo, China | | HS Code | 7318150000 | | Production Capacity | 2500tons/Year | | Package Size | 10.00cm * 10.00cm * 10.00cm | | Package Gross Weight | 1.000kg | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | Available Material | Carbon steel,Stainless steel,Duplex Stainless steel Brass,Copper,Plastic,Aluminum | | --- | --- | | Surface Treatment | Zinc Plated/Galvanized,Nickel Plated,HDG,Copper Plated,Anodized,Polishing. | | Powder Coating | Geomet,Dacromet,Passivation,Electrophoesis, | | Equipments | Cold forging Machine,Thread Rolling Machine,CNC Machine,Lather Machine, | | Processing Way | Grinding Machine,Milling Machine,Drilling Machine,Casting Machine | | Cold Forging,Stamping,Rolling,Bending,Casting,Extrusion,Milling,Welding,Turning | | | Processing drawing Format | . jpg /. pdf / . dwg / . igs / . stp etc. | | Trade Term | EXW, FOB, CIF, DDP, CFR,or as discussing | | Payment Term | T/T,L/C,Western Uion | | Packagement | Plastic Bag+Chipboard Carton +Plywood Pallet With Belt and Film | ## Description DIN7991 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8 is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, GB, ANSI, JIS, GOST - **Material:** Carbon Steel - **Grade:** 4.8,8.8,10.9,12.9 - **Head Style:** Counter Sunk Bolt - **Groove:** Hexagon - **Surface Treatment:** According to Requirements - **Connection:** Common Bolt Available configurations include material, head style, standard, grade and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces at US$0.12 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 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8? The listed minimum order is 1,000 pieces, at US$0.12 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 Hexagon Socket Countersunk Head Cap Screws with Black Surface Treatment M8? Type: Countersunk Head; Standard: DIN, GB, ANSI, JIS, GOST; Material: Carbon Steel; Grade: 4.8,8.8,10.9,12.9; Head Style: Counter Sunk Bolt; Groove: Hexagon. 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 surface treatment. 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 & flat-head machine screws are available? The Countersunk & Flat-Head Machine Screws category lists 2,424 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) 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 & Flat-Head Machine Screws →](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) [![Flat Head Brass Screw Rivet Belt Bag Hardware Accessories](https://img.engineeringhardware.com/Flat-Head-Brass-Screw-Rivet-Belt-Bag-Hardware-Accessories.webp)](https://engineeringhardware.com/product/flat-head-brass-screw-rivet-belt-bag-hardware-accessories/) Countersunk & Flat-Head Machine Screws ### [Flat Head Brass Screw Rivet Belt Bag Hardware Accessories](https://engineeringhardware.com/product/flat-head-brass-screw-rivet-belt-bag-hardware-accessories/) Round Head · DIN, GB **US$0.96 – 1.44**MOQ 1,000 pieces [![DIN464 Stainless Steel Knurled Thumb Flat Head 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for](https://engineeringhardware.com/product/304-stainless-steel-carbon-steel-phillips-countersunk-screw-sealing-washer/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$12.00**MOQ 1,000 pieces **US$0.12**MOQ 1,000 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%20Hexagon%20Socket%20Countersunk%20Head%20Cap%20Screws%20with%20Black%20Surface%20Treatment%20M8%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hexagon-socket-countersunk-head-cap-screws-with-black-surface-treatment-m8%2F)