--- title: "DIN7991 Hex Socket Countersunk Flat Head Machine Screw" description: "DIN7991 Hex Socket Countersunk Flat Head Machine Screw — Socket Head Cap & Allen Screws. MOQ 50 pieces, US$0.012." url: https://engineeringhardware.com/product/din7991-hex-socket-countersunk-flat-head-machine-screw/ source: Engineering Hardware & Fasteners --- # DIN7991 Hex Socket Countersunk Flat Head Machine Screw [![DIN7991 Hex Socket Countersunk Flat Head Machine Screw](https://img.engineeringhardware.com/DIN7991-Hex-Socket-Countersunk-Flat-Head-Machine-Screw.webp)](https://img.engineeringhardware.com/DIN7991-Hex-Socket-Countersunk-Flat-Head-Machine-Screw.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/din7991-hex-socket-countersunk-flat-head-machine-screw.md) US$0.012 / piece MOQ 50 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Round - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** A2-70/A4-80/A4-70 - **Thread:** Unc - **Color:** Silver White - **Package Size:** 27.50cm * 25.00cm * 17.00cm 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%20Hex%20Socket%20Countersunk%20Flat%20Head%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hex-socket-countersunk-flat-head-machine-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 | Customization | Available | | --- | --- | | Material | Stainless Steel | | Type | Countersunk Head | | Groove | Flower Word | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | A2-70/A4-80/A4-70 | | Product Name | Machine Screws with Solid Post in Center of Recess | | Drawing | Accept | | Sample | Free Sample When Is in Stock | | Thread | Unc | | Service | Custom-Made Service | | Color | Silver White | | Transport Package | Plastic Bags and Cartons | | Specification | M2-M10 | | Origin | China | | HS Code | 7318160000 | | Production Capacity | 3000000 Pieces/ Month | | Package Size | 27.50cm * 25.00cm * 17.00cm | | Package Gross Weight | 20.000kg | | Lead Time | 7 days (1 - 1000 Pieces) To be negotiated ( > 1000 Pieces) | | Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) | ## Technical parameters | Standard | As per drawing | | --- | --- | | Diameter | M2-M10 | | sample service | Free sample but freight cost is paid by customers(when sample is in stock) sample fee(when samples need to be customized) | | Material | SS304,SS316,SS2205,SS2507 | | MOQ | 1000 | | Surface treatment | Plain, black oxide | | Package | Plastic bag, Boxes and cartons, Pallets, Customized | | Price terms | EXW, FOB, CIF, etc. | | Payment terms | T/T, Paypal, L/C, Western union, etc. | | Certifications | ISO 9001 | | Note | Free Samples could be provided for standard fastener | ## Description DIN7991 Hex Socket Countersunk Flat Head Machine Screw is part of our socket head cap & allen screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Stainless Steel - **Grade:** A2-70/A4-80/A4-70 - **Thread:** Unc - **Head Style:** Round - **Groove:** Flower Word - **Connection:** Common Bolt Available configurations include material, head style, standard, grade and thread. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 50 pieces at US$0.012 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 Hex Socket Countersunk Flat Head Machine Screw? The listed minimum order is 50 pieces, at US$0.012 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 Hex Socket Countersunk Flat Head Machine Screw? Type: Countersunk Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Stainless Steel; Grade: A2-70/A4-80/A4-70; Thread: Unc; Head Style: Round. 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 thread. 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 socket head cap & allen screws are available? The Socket Head Cap & Allen Screws category lists 2,042 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-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 Socket Head Cap & Allen Screws →](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) [![Allen Key Head DIN7991 Stainless Steel 304 Black Hex Socket Flat Countersunk Head Screw](https://img.engineeringhardware.com/Allen-Key-Head-DIN7991-Stainless-Steel-304-Black-Hex-Socket-Flat-Countersunk-Head-Screw.webp)](https://engineeringhardware.com/product/allen-key-head-din7991-stainless-steel-304-black-hex-socket-flat-countersunk-head/) Socket Head Cap & Allen Screws ### [Allen Key Head DIN7991 Stainless Steel 304 Black Hex Socket Flat Countersunk Head Screw](https://engineeringhardware.com/product/allen-key-head-din7991-stainless-steel-304-black-hex-socket-flat-countersunk-head/) Countersunk Head · DIN, ANSI, GB **US$0.012 – 1.20**MOQ 1,000 pieces [![Factory Price DIN 912 Stainless Steel Hex Hexagon Socket Head Cap 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ANSI, GB, JIS, BSW, GOST **US$0.012 – 0.06**MOQ 1,000 pieces **US$0.012**MOQ 50 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%20Hex%20Socket%20Countersunk%20Flat%20Head%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hex-socket-countersunk-flat-head-machine-screw%2F)