--- title: "DIN7991 Flat Head Hexagon Socket Countersunk Head Cap Screw" description: "DIN7991 Flat Head Hexagon Socket Countersunk Head Cap Screw — Countersunk & Flat-Head Machine Screws. MOQ 2,000 pieces, US$0.91 – 5,914." url: https://engineeringhardware.com/product/din7991-flat-head-hexagon-socket-countersunk-head-cap-screw/ source: Engineering Hardware & Fasteners --- # DIN7991 Flat Head Hexagon Socket Countersunk Head Cap Screw [![DIN7991 Flat Head Hexagon Socket Countersunk Head Cap Screw](https://img.engineeringhardware.com/DIN7991-Flat-Head-Hexagon-Socket-Countersunk-Head-Cap-Screw.webp)](https://img.engineeringhardware.com/DIN7991-Flat-Head-Hexagon-Socket-Countersunk-Head-Cap-Screw.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-flat-head-hexagon-socket-countersunk-head-cap-screw.md) US$0.91 – 5,914 / piece MOQ 2,000 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Hexagon Socket - **Standard:** DIN, GB - **Grade:** Stainless Steel - **Finish:** Original - **Thread:** Full Thread - **Color:** Plain - **Package Size:** 14.50cm * 12.50cm * 8.50cm 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%20Flat%20Head%20Hexagon%20Socket%20Countersunk%20Head%20Cap%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-flat-head-hexagon-socket-countersunk-head-cap-screw%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 | Material | Stainless Steel | | --- | --- | | Type | Countersunk Head | | Connection | Common Bolt | | Head Style | Hexagon Socket | | Standard | DIN, GB | | Grade | Stainless Steel | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Original | | Customization | Available | | Thread | Full Thread | | Service | OEM/ODM | | Color | Plain | | Transport Package | Carton | | Specification | Customized | | Origin | China | | Package Size | 14.50cm * 12.50cm * 8.50cm | | Package Gross Weight | 5.000kg | | Size | M5, M6, M8, M10, M12, M14, M16, M18, M20 | | Length | 8, 10, 12, 14, 16, 18, 20, 22, 25, 30, 35mm | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | Standard Code | Material Category | Diameter Range | Range Of Sizes | | --- | --- | --- | --- | | DIN 7991 | Carbon steel, Alloy steel, Stainless steel | M3 – M24 | 6 – 200 mm (typical) | | ISO 10642 | Carbon steel, Alloy steel, Stainless steel | M2 – M20 | 6 – 200 mm (typical) | | GB/T 70.3 | Carbon steel, Alloy steel, Stainless steel | M2 – M20 | 6 – 100 mm (common) | | GB/T 2673.1 | Carbon steel, Alloy steel, Stainless steel | M2 – M10 | 6 – 80 mm (common) | | Customization | Available | | --- | --- | | Material | Stainless Steel | | Connection | Common Bolt | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Polishing | | Thread | Full Thread | | Service | OEM/ODM | | Delivery | 15-20 Days | | Payment | T/T, L/C, DP,and so on | | Color | Plain | | Transport Package | Carton | | Specification | Customize | | Origin | China | ## Description DIN7991 Flat Head Hexagon Socket Countersunk Head Cap Screw is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, GB - **Material:** Stainless Steel - **Grade:** Stainless Steel - **Size:** M5, M6, M8, M10, M12, M14, M16, M18, M20 - **Thread:** Full Thread - **Length:** 8, 10, 12, 14, 16, 18, 20, 22, 25, 30, 35mm - **Head Style:** Hexagon Socket 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 2,000 pieces at US$0.91 – 5,914 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 Flat Head Hexagon Socket Countersunk Head Cap Screw? The listed minimum order is 2,000 pieces, at US$0.91 – 5,914 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 Flat Head Hexagon Socket Countersunk Head Cap Screw? Type: Countersunk Head; Standard: DIN, GB; Material: Stainless Steel; Grade: Stainless Steel; Size: M5, M6, M8, M10, M12, M14, M16, M18, M20; Thread: Full Thread. 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 & 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/) [![Heavy-Duty Plastic Flat Head Barrel Screws with Protective Caps](https://img.engineeringhardware.com/Heavy-Duty-Plastic-Flat-Head-Barrel-Screws-with-Protective-Caps.webp)](https://engineeringhardware.com/product/heavy-duty-plastic-flat-head-barrel-screws-with-protective-caps/) Countersunk & Flat-Head Machine Screws ### [Heavy-Duty Plastic Flat Head Barrel Screws with Protective Caps](https://engineeringhardware.com/product/heavy-duty-plastic-flat-head-barrel-screws-with-protective-caps/) ABS · All Brands for Silicone (Silicone, High Strength S **US$0.012 – 0.12**MOQ 100 pieces [![Premium 304 Stainless Steel Metric Cross Recessed Countersunk 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