--- title: "DIN7991 Hexagon Socket Countersunk Head Cap Screws A4-80" description: "DIN7991 Hexagon Socket Countersunk Head Cap Screws A4-80 — Countersunk & Flat-Head Machine Screws. MOQ 50,000 pieces, US$0.0636 – 0.22." url: https://engineeringhardware.com/product/din7991-hexagon-socket-countersunk-head-cap-screws-a4-80/ source: Engineering Hardware & Fasteners --- # DIN7991 Hexagon Socket Countersunk Head Cap Screws A4-80 [![DIN7991 Hexagon Socket Countersunk Head Cap Screws A4-80](https://img.engineeringhardware.com/DIN7991-Hexagon-Socket-Countersunk-Head-Cap-Screws-A4-80.webp)](https://img.engineeringhardware.com/DIN7991-Hexagon-Socket-Countersunk-Head-Cap-Screws-A4-80.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-a4-80.md) Model no. **m3x6 to m16x60** US$0.0636 – 0.22 / piece MOQ 50,000 pieces · Final price confirmed in your quote - **Head Style:** Countersunk - **Standard:** DIN, GB, ANSI, BSW - **Grade:** A4-80 - **Material:** Stainless Steel 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%20A4-80%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hexagon-socket-countersunk-head-cap-screws-a4-80%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 | Model NO. | m3x6 to m16x60 | | --- | --- | | Groove | Cross | | Connection | Common Bolt | | Head Style | Countersunk | | Standard | DIN, GB, ANSI, BSW | | Grade | A4-80 | | Transport Package | Ctns and Pallet | | Specification | m3x6 to m16x60 | | Origin | Zhejiang China | | HS Code | 7318140001 | | Production Capacity | 10000000 | | Customization | Available | | Material | Stainless Steel | | Type | Countersunk Head | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | DESCRIPTION | SUS316 /304 | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | Product Name | A2 A4 Stainless Steel DIN7991 SOCKET CSK HEAD MACHINE SCREW | | --- | --- | | Material | Stainless Steel 304/316 | | Color | Polish | | Standard | DIN,ASME,ASNI,ISO | | Grade | SS304,SS316 | | Finished | Polish | | Thread | Coarse, Fine | | Used | Building Industry Machinery | ## Description DIN7991 Hexagon Socket Countersunk Head Cap Screws A4-80 is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, GB, ANSI, BSW - **Material:** Stainless Steel - **Grade:** A4-80 - **Head Style:** Countersunk - **Groove:** Cross - **Connection:** Common Bolt - **DESCRIPTION:** SUS316 /304 Available configurations include head style, standard, grade and material. 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$0.0636 – 0.22 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 A4-80? The listed minimum order is 50,000 pieces, at US$0.0636 – 0.22 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 A4-80? Type: Countersunk Head; Standard: DIN, GB, ANSI, BSW; Material: Stainless Steel; Grade: A4-80; Head Style: Countersunk; Groove: Cross. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include head style, standard, grade and material. 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 & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp) Sorting & packing [![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp) Parts warehouse [![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp) Sample review [![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp) Sales office [More about us →](https://engineeringhardware.com/about/) · [Request a sample or 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/) [![High-Quality Red Copper Countersunk Solid Rivets Leather Wallet Custom](https://img.engineeringhardware.com/High-Quality-Red-Copper-Countersunk-Solid-Rivets-Leather-Wallet-Custom.webp)](https://engineeringhardware.com/product/high-quality-red-copper-countersunk-solid-rivets-leather-wallet-custom/) Countersunk & Flat-Head Machine Screws ### [High-Quality Red Copper Countersunk Solid Rivets Leather Wallet Custom](https://engineeringhardware.com/product/high-quality-red-copper-countersunk-solid-rivets-leather-wallet-custom/) Copper · Customizable **US$0.012 – 0.036**MOQ 10,000 pieces [![Premium Zinc Plated Hardened Countersunk Nut with Internal & External 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