--- title: "SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw" description: "SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw — Countersunk & Flat-Head Machine Screws. MOQ 100 pieces, US$0.29 – 0.34." url: https://engineeringhardware.com/product/ss316-din7991-hexagon-socket-countersunk-head-cap-screw/ source: Engineering Hardware & Fasteners --- # SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw [![SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw](https://img.engineeringhardware.com/SS316-DIN7991-Hexagon-Socket-Countersunk-Head-Cap-Screw.webp)](https://img.engineeringhardware.com/SS316-DIN7991-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/ss316-din7991-hexagon-socket-countersunk-head-cap-screw.md) Model no. **M12X40** | **US$0.34**100–499 pieces | **US$0.31**500–999 pieces | **US$0.30**1,000–4,999 pieces | **US$0.29**5,000+ pieces | | --- | --- | --- | --- | MOQ 100 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, ISO - **Grade:** A4-70 - **Finish:** Passivation - **Price for The Size:** M12X40 Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20SS316%20DIN7991%20Hexagon%20Socket%20Countersunk%20Head%20Cap%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fss316-din7991-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 | Customization | Available | | --- | --- | | Material | Stainless Steel | | Type | Hexagon Head | | Model NO. | M12X40 | | Connection | Common Bolt | | Head Style | Hexagonal | | Standard | DIN, ANSI, ISO | | Grade | A4-70 | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Passivation | | Price for The Size | M12X40 | | Transport Package | CTN, Then in Pallet | | Specification | M12X40 | | Origin | Jiangsu, China | | HS Code | 7318151090 | | Production Capacity | 100ton/Month | | Our advantages | Trustworthy supplier--We use real material always! | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | Bolt and screw standard | DIN/ISO/ASME | | --- | --- | | Material | SS304/SS316/SS316L | ## Description SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, ISO - **Material:** Stainless Steel - **Grade:** A4-70 - **Head Style:** Hexagonal - **Finish:** Passivation - **Connection:** Common Bolt - **Application:** Machinery, Chemical Industry, Environmental, Building 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 100 pieces at US$0.29 – 0.34 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 SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw? The listed minimum order is 100 pieces, at US$0.29 – 0.34 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### How does the price change with quantity? Volume pricing: US$0.34 for 100–499 pieces; US$0.31 for 500–999 pieces; US$0.30 for 1,000–4,999 pieces; US$0.29 for 5,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of SS316 DIN7991 Hexagon Socket Countersunk Head Cap Screw? Type: Hexagon Head; Standard: DIN, ANSI, ISO; Material: Stainless Steel; Grade: A4-70; Head Style: Hexagonal; Finish: Passivation. 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 Load Capacity Cross Recessed Countersunk Head Carbon Steel Machine Screws](https://img.engineeringhardware.com/Heavy-Load-Capacity-Cross-Recessed-Countersunk-Head-Carbon-Steel-Machine-Screws.webp)](https://engineeringhardware.com/product/heavy-load-capacity-cross-recessed-countersunk-head-carbon-steel-machine-screws/) Countersunk & Flat-Head Machine Screws ### [Heavy Load Capacity Cross Recessed Countersunk Head Carbon Steel Machine Screws](https://engineeringhardware.com/product/heavy-load-capacity-cross-recessed-countersunk-head-carbon-steel-machine-screws/) Countersunk Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.072 – 0.12**MOQ 1,000 pieces [![Steel Cheese Head Torx Machine Screw Round Head 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