--- title: "Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw" description: "Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw — Socket Head Cap & Allen Screws. MOQ 100 pieces, US$0.12." url: https://engineeringhardware.com/product/stainless-steel-din-7991-hex-socket-countersunk-head-screw/ source: Engineering Hardware & Fasteners --- # Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw [![Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw](https://img.engineeringhardware.com/Stainless-Steel-DIN-7991-Hex-Socket-Countersunk-Head-Screw.webp)](https://img.engineeringhardware.com/Stainless-Steel-DIN-7991-Hex-Socket-Countersunk-Head-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/stainless-steel-din-7991-hex-socket-countersunk-head-screw.md) Model no. **QS-Fastener-004** US$0.12 / piece MOQ 100 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Round - **Standard:** DIN, ANSI, GB, JIS, BSW - **Finish:** Passivation - **Surface Treatment:** Plain - **Thread:** Full Thread, Unc, Unf - **Length:** According to Client's Requirement - **Size Range:** M6-M100 Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Stainless%20Steel%20DIN%207991%20Hex%20Socket%20Countersunk%20Head%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fstainless-steel-din-7991-hex-socket-countersunk-head-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 | | Model NO. | QS-Fastener-004 | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, ANSI, GB, JIS, BSW | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Passivation | | Surface Treatment | Plain | | Delivery | 2-4 Weeks | | Thread | Full Thread, Unc, Unf | | Length | According to Client's Requirement | | Size Range | M6-M100 | | Length Range | 10mm - 1000mm | | Transport Package | Plywood Cases/Wooden Boxes | | Specification | M8*35 | | Origin | China | | HS Code | 7318159090 | | Package Size | 20.00cm * 20.00cm * 15.00cm | | Package Gross Weight | 2.000kg | | Lead Time | 30 days (1 - 100000 Pieces) To be negotiated ( > 100000 Pieces) | | Step 1 confirms the requirement | function, material, dimensions, appearance and any special needs. Step 2 turns the requirement into 2D or 3D drawings that both sides review. Step 3 prices the job from raw material, processing hours and complexity. Step 4 makes a sample to verify the design before volume work. | | ISO 9001 | 2015 quality management system certificate. | | Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) | ## Technical parameters | Item | Range | | --- | --- | | Size Range | M2 to M16, customized sizes available | | Material | Stainless steel 201, 304, 316, 430 and carbon steel | | Grade | A2-70, A4-70, A4-80 and 8.8, 10.9, 12.9 | | Finish | Polishing, black oxide, zinc plating, hot-dip galvanizing, bluing | | Standard | GB, DIN, ISO, ANSI/ASTM, BS, BSW | | Samples | Complimentary, delivery charges apply | | Package | Inner bag + master carton + wooden pallet + stretch film, with desiccant and edge protectors as needed | | Shipping Port | Xiamen | | Inspection | 100 percent QC steps before shipment | | Question | Answer | | --- | --- | ## Description Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw is part of our socket head cap & allen screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, ANSI, GB, JIS, BSW - **Material:** Stainless Steel - **Thread:** Full Thread, Unc, Unf - **Length:** According to Client's Requirement - **Head Style:** Round - **Surface Treatment:** Plain - **Finish:** Passivation Available configurations include material, head style, standard, finish and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 100 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 Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw? The listed minimum order is 100 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 Stainless Steel DIN 7991 Hex Socket Countersunk Head Screw? Type: Countersunk Head; Standard: DIN, ANSI, GB, JIS, BSW; Material: Stainless Steel; Thread: Full Thread, Unc, Unf; Length: According to Client's Requirement; 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, finish 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 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/) [![DIN 912 Left Hand Thread Hex Socket Cap Head Screw](https://img.engineeringhardware.com/DIN-912-Left-Hand-Thread-Hex-Socket-Cap-Head-Screw.webp)](https://engineeringhardware.com/product/din-912-left-hand-thread-hex-socket-cap-head-screw/) Socket Head Cap & Allen Screws ### [DIN 912 Left Hand Thread Hex Socket Cap Head Screw](https://engineeringhardware.com/product/din-912-left-hand-thread-hex-socket-cap-head-screw/) Cylinder Head · DIN, ANSI **US$0.006 – 0.024**MOQ 10,000 pieces [![Malaxy Button Head Socket Cap Screw ISO 7380 Carbon Steel 10.9 Black Oxide Industrial Fastener Supplier OEM Button Head Screw](https://img.engineeringhardware.com/Malaxy-Button-Head-Socket-Cap-Screw-ISO-7380-Carbon-Steel-10-9-Black-Oxide-Industrial-Fastener-Supplier-OEM-Button-Head-Screw.webp)](https://engineeringhardware.com/product/malaxy-button-head-socket-cap-screw-iso-7380-carbon-steel-10-9-black-oxide/) Socket Head Cap & Allen Screws ### [Malaxy Button Head Socket Cap Screw ISO 7380 Carbon Steel 10.9 Black Oxide Industrial Fastener Supplier OEM Button Head Screw](https://engineeringhardware.com/product/malaxy-button-head-socket-cap-screw-iso-7380-carbon-steel-10-9-black-oxide/) Round Head · DIN, GB, ANSI, BSW, GOST **US$0.012 – 0.036**MOQ 1 piece [![Custom Hex Socket Cap Pan Head Flange Screw Stainless Steel Button Flange Hex Socket Screws with Washer](https://img.engineeringhardware.com/Custom-Hex-Socket-Cap-Pan-Head-Flange-Screw-Stainless-Steel-Button-Flange-Hex-Socket-Screws-with-Washer.webp)](https://engineeringhardware.com/product/custom-hex-socket-cap-pan-head-flange-screw-stainless-steel-button-flange-hex-socket/) Socket Head Cap & Allen Screws ### [Custom Hex Socket Cap Pan Head Flange Screw Stainless Steel Button Flange Hex Socket Screws with Washer](https://engineeringhardware.com/product/custom-hex-socket-cap-pan-head-flange-screw-stainless-steel-button-flange-hex-socket/) Round Head · DIN **US$0.072 – 0.17**MOQ 1,000 pieces [![China Supplier 18-8 Steel DIN912 Knurled Unknurled Socket Head Cap Machine Screw](https://img.engineeringhardware.com/China-Supplier-18-8-Steel-DIN912-Knurled-Unknurled-Socket-Head-Cap-Machine-Screw.webp)](https://engineeringhardware.com/product/china-supplier-18-8-steel-din912-knurled-unknurled-socket-head-cap-machine-screw/) Socket Head Cap & Allen Screws ### [China Supplier 18-8 Steel DIN912 Knurled Unknurled Socket Head Cap Machine Screw](https://engineeringhardware.com/product/china-supplier-18-8-steel-din912-knurled-unknurled-socket-head-cap-machine-screw/) Cheese Head · DIN, GB, ANSI, BSW, JIS, GOST, Per Customers'desire **US$0.012 – 0.12**MOQ 5,000 pieces [![High-Performance 12.9 Grade Hex Socket Cap Screws for Enhanced Strength](https://img.engineeringhardware.com/High-Performance-12-9-Grade-Hex-Socket-Cap-Screws-for-Enhanced-Strength.webp)](https://engineeringhardware.com/product/high-performance-12-9-grade-hex-socket-cap-screws-for-enhanced-strength/) Socket Head Cap & Allen Screws ### [High-Performance 12.9 Grade Hex Socket Cap Screws for Enhanced Strength](https://engineeringhardware.com/product/high-performance-12-9-grade-hex-socket-cap-screws-for-enhanced-strength/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.012 – 0.12**MOQ 1,000 boxes [![A Grade Stainless Steel Round Head Hex Socket Screw Three Combination M3 M4 M5 M6 etc](https://img.engineeringhardware.com/A-Grade-Stainless-Steel-Round-Head-Hex-Socket-Screw-Three-Combination-M3-M4-M5-M6-etc.webp)](https://engineeringhardware.com/product/a-grade-stainless-steel-round-head-hex-socket-screw-three-combination-m3-m4-m5-m6-etc/) Socket Head Cap & Allen Screws ### [A Grade Stainless Steel Round Head Hex Socket Screw Three Combination M3 M4 M5 M6 etc](https://engineeringhardware.com/product/a-grade-stainless-steel-round-head-hex-socket-screw-three-combination-m3-m4-m5-m6-etc/) Button Head · DIN, GB, ANSI, BSW, JIS **US$0.012 – 0.072**MOQ 1,000 pieces [![Hot Sale Brass Copper Hex Socket Button Head Cap Screw](https://img.engineeringhardware.com/Hot-Sale-Brass-Copper-Hex-Socket-Button-Head-Cap-Screw.webp)](https://engineeringhardware.com/product/hot-sale-brass-copper-hex-socket-button-head-cap-screw/) Socket Head Cap & Allen Screws ### [Hot Sale Brass Copper Hex Socket Button Head Cap Screw](https://engineeringhardware.com/product/hot-sale-brass-copper-hex-socket-button-head-cap-screw/) Hexagon Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.14 – 6.00**MOQ 5,000 pieces [![Premium DIN6921 Hexagon Socket Head Cap Screws for Industrial Use](https://img.engineeringhardware.com/Premium-DIN6921-Hexagon-Socket-Head-Cap-Screws-for-Industrial-Use.webp)](https://engineeringhardware.com/product/premium-din6921-hexagon-socket-head-cap-screws-for-industrial-use/) Socket Head Cap & Allen Screws ### [Premium DIN6921 Hexagon Socket Head Cap Screws for Industrial Use](https://engineeringhardware.com/product/premium-din6921-hexagon-socket-head-cap-screws-for-industrial-use/) Hexagon Head · DIN, GB, JIS, GOST, ISO **US$0.006 – 0.096**MOQ 5,000 pieces **US$0.12**MOQ 100 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Stainless%20Steel%20DIN%207991%20Hex%20Socket%20Countersunk%20Head%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fstainless-steel-din-7991-hex-socket-countersunk-head-screw%2F)