--- title: "DIN7991 Hex Socket Flat Head Cap Screws Stainless Steel" description: "DIN7991 Hex Socket Flat Head Cap Screws Stainless Steel — Socket Head Cap & Allen Screws. MOQ 10,000 pieces, US$0.036 – 1.20." url: https://engineeringhardware.com/product/din7991-hex-socket-flat-head-cap-screws-stainless-steel/ source: Engineering Hardware & Fasteners --- # DIN7991 Hex Socket Flat Head Cap Screws Stainless Steel [![DIN7991 Hex Socket Flat Head Cap Screws Stainless Steel](https://img.engineeringhardware.com/DIN7991-Hex-Socket-Flat-Head-Cap-Screws-Stainless-Steel.webp)](https://img.engineeringhardware.com/DIN7991-Hex-Socket-Flat-Head-Cap-Screws-Stainless-Steel.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-flat-head-cap-screws-stainless-steel.md) Model no. **M3-24** US$0.036 – 1.20 / piece MOQ 10,000 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Round - **Standard:** DIN, GB - **Grade:** 4.8 - **Size:** M3-24 - **Length:** 8-100 - **Diameter:** From M3-M24 - **Packing:** In carton 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%20Flat%20Head%20Cap%20Screws%20Stainless%20Steel%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-hex-socket-flat-head-cap-screws-stainless-steel%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 | Round Head | | Model NO. | M3-24 | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, GB | | Grade | 4.8 | | Size | M3-24 | | Length | 8-100 | | Transport Package | 25kg/Carton, 36 Carton/Pallet. | | Specification | DIN7991, GB, JISB, ISO, ANSI/ASME B, W. S. W | | Origin | China | | HS Code | 7318160000 | | Production Capacity | 8000 Tons Per Year | | Diameter | From M3-M24 | | Packing | In carton | | ABOUT US | Wellbolt is an excellent fasteners & metal production manufacturer and exporter in China,from the beginning of the production of bolts and screws, established its full range fastener distribution line 3 years later. | | All our processes strictly adhere to ISO9001 | 2008 procedures. We have strict quality control from producing to | | Standard parts | 7-15days | | Non-standard parts | 15-25days | | Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) | ## Technical parameters | Diameter: | From M3-M24 | | --- | --- | | Length | From 8mm-100mm | | Material | Carbon steel, alloy steel, Stainless steel A2/A4. | | Coating | ZP, Black, HDG, Dacromet, Geomet, etc. | | Packing: | In carton | | MOQ | about 300 Kgs | | Production capacity | About 600 Tons per Month | ## Description DIN7991 Hex Socket Flat Head Cap Screws Stainless Steel is part of our socket head cap & allen screws range (Screws). ### Key details - **Type:** Round Head - **Standard:** DIN, GB - **Material:** Stainless Steel - **Grade:** 4.8 - **Size:** M3-24 - **Diameter:** From M3-M24 - **Length:** 8-100 - **Head Style:** Round Available configurations include material, head style, standard, grade and size. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 10,000 pieces at US$0.036 – 1.20 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 Flat Head Cap Screws Stainless Steel? The listed minimum order is 10,000 pieces, at US$0.036 – 1.20 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 Flat Head Cap Screws Stainless Steel? Type: Round Head; Standard: DIN, GB; Material: Stainless Steel; Grade: 4.8; Size: M3-24; Diameter: From M3-M24. 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 size. 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/) [![ANSI Stainless Steel Plain Finish, Hex Socket Drive Shoulder Screw](https://img.engineeringhardware.com/ANSI-Stainless-Steel-Plain-Finish-Hex-Socket-Drive-Shoulder-Screw.webp)](https://engineeringhardware.com/product/ansi-stainless-steel-plain-finish-hex-socket-drive-shoulder-screw/) Socket Head Cap & Allen Screws ### [ANSI Stainless Steel Plain Finish, Hex Socket Drive Shoulder Screw](https://engineeringhardware.com/product/ansi-stainless-steel-plain-finish-hex-socket-drive-shoulder-screw/) Shoulder Screw · DIN, GB, Per Customers' Desire **US$0.0067 – 0.0115**MOQ 1,000 pieces [![Protective Packaging Ss 304 316 Hex Socket Head Cap Screw Full 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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 [![DIN 912 A2-70 Stainless Steel Hex Socket Head Cap Screw](https://img.engineeringhardware.com/DIN-912-A2-70-Stainless-Steel-Hex-Socket-Head-Cap-Screw.webp)](https://engineeringhardware.com/product/din-912-a2-70-stainless-steel-hex-socket-head-cap-screw/) Socket Head Cap & Allen Screws ### [DIN 912 A2-70 Stainless Steel Hex Socket Head Cap Screw](https://engineeringhardware.com/product/din-912-a2-70-stainless-steel-hex-socket-head-cap-screw/) Hex Socket Head · DIN, GB **US$0.012 – 0.048**MOQ 100 pieces **US$0.036 – 1.20**MOQ 10,000 piecesGet a 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