--- title: "Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw" description: "Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw — Hex-Head Bolts. MOQ 50,000 pieces, US$0.096 – 0.12." url: https://engineeringhardware.com/product/hex-socket-bolt-flat-head-hex-bolt-hex-socket-countersunk-din7991-machine-screw/ source: Engineering Hardware & Fasteners --- # Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw [![Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw](https://img.engineeringhardware.com/Hex-Socket-Bolt-Flat-Head-Hex-Bolt-Hex-Socket-Countersunk-DIN7991-Machine-Screw.webp)](https://img.engineeringhardware.com/Hex-Socket-Bolt-Flat-Head-Hex-Bolt-Hex-Socket-Countersunk-DIN7991-Machine-Screw.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Hex-Head Bolts](https://engineeringhardware.com/fastener-products/bolts/hex-head-bolts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/hex-socket-bolt-flat-head-hex-bolt-hex-socket-countersunk-din7991-machine-screw.md) | **US$0.12**50,000–99,999 pieces | **US$0.096**100,000+ pieces | | --- | --- | MOQ 50,000 pieces · Final price confirmed in your quote - **Head Style:** Counter Sunk Bolt - **Standard:** DIN, GB - **Grade:** 8.8 /10.9 - **Length:** 3-150mm - **Package Size:** 10.00cm * 10.00cm * 8.00cm - **Material:** Stainless Steel - **Packing type:** 1. Bulk packing in wowen bag. Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Hex%20Socket%20Bolt%20Flat%20Head%20Hex%20Bolt%20Hex%20Socket%20Countersunk%20DIN7991%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhex-socket-bolt-flat-head-hex-bolt-hex-socket-countersunk-din7991-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 | Groove | Hexagon | | --- | --- | | Connection | Common Bolt | | Head Style | Counter Sunk Bolt | | Standard | DIN, GB | | Grade | 8.8 /10.9 | | Products | DIN7991 Machine Screw | | MOQ | 1 Ton Each Size | | Application | General Industry/Automotive Industry/Retail Indust | | Length | 3-150mm | | Transport Package | Box Package+Carton | | Specification | M2-M12 | | Origin | Tianjin, China | | HS Code | 7318150000 | | Production Capacity | 10000 T/ Year | | Package Size | 10.00cm * 10.00cm * 8.00cm | | Package Gross Weight | 2.000kg | | Customization | Available | | Material | Stainless Steel | | Type | Hexagon Head | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | Packing type | 1. Bulk packing in wowen bag. | | Category | [Hex-Head Bolts](https://engineeringhardware.com/fastener-products/bolts/hex-head-bolts/) | ## Technical parameters | Name | DIN7991 Hexagon socket countersunk head machine screws | | --- | --- | | Place of Origin | Tianjin, China | | Size | M3-M12 or non-standard as request&design | | Finish | plain, zinc plated, black oxide, hot dip galv.et | | Head Type | countersunk head | | Material | Carbon steel, stainless steel, alloys steel etc. | | Grade | A2,A4,4.8,8.8,10.9,12.9.etc | | Standard | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc | | Non-standards | OEM is available, according to drawing or samples | | Samples | Samples are free. | | Package | Bulk in master cartons, then on pallets, or according to customers' requirement. | | Payment | T/T | ## Description Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw is part of our hex-head bolts range (Bolts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, GB - **Material:** Stainless Steel - **Grade:** 8.8 /10.9 - **Length:** 3-150mm - **Head Style:** Counter Sunk Bolt - **Groove:** Hexagon - **Connection:** Common Bolt Available configurations include head style, standard, grade, length and package size. 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$0.096 – 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 Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw? The listed minimum order is 50,000 pieces, at US$0.096 – 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. ### How does the price change with quantity? Volume pricing: US$0.12 for 50,000–99,999 pieces; US$0.096 for 100,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Hex Socket Bolt Flat Head Hex Bolt Hex Socket Countersunk DIN7991 Machine Screw? Type: Hexagon Head; Standard: DIN, GB; Material: Stainless Steel; Grade: 8.8 /10.9; Length: 3-150mm; Head Style: Counter Sunk Bolt. 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, length and package 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 hex-head bolts are available? The Hex-Head Bolts category lists 8,449 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/hex-head-bolts/](https://engineeringhardware.com/fastener-products/bolts/hex-head-bolts/) 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 Hex-Head Bolts →](https://engineeringhardware.com/fastener-products/bolts/hex-head-bolts/) [![Custom Stainless Steel SS304 SS316 Tube Bolt Hex Hollow Bolt with Internal Thread](https://img.engineeringhardware.com/Custom-Stainless-Steel-SS304-SS316-Tube-Bolt-Hex-Hollow-Bolt-with-Internal-Thread.webp)](https://engineeringhardware.com/product/custom-stainless-steel-ss304-ss316-tube-bolt-hex-hollow-bolt-with-internal-thread/) Hex-Head Bolts ### [Custom Stainless Steel SS304 SS316 Tube Bolt Hex Hollow Bolt with Internal Thread](https://engineeringhardware.com/product/custom-stainless-steel-ss304-ss316-tube-bolt-hex-hollow-bolt-with-internal-thread/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.096 – 0.14**MOQ 10,000 pieces [![DIN933 Full Thread Bolts / Hexagon Head Screws/4.4, 8.8, 10.9, 12.9 Grade Hex Head 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Anywhere](https://engineeringhardware.com/product/eco-friendly-plastic-bolts-for-high-strength-fastening-solutions-anywhere/) Hexagon Head · DIN, ANSI, GB, JIS **US$0.012**MOQ 1 piece [![A2 Stainless Steel Solar Hanger Bolts for Timber](https://img.engineeringhardware.com/A2-Stainless-Steel-Solar-Hanger-Bolts-for-Timber.webp)](https://engineeringhardware.com/product/a2-stainless-steel-solar-hanger-bolts-for-timber/) Hex-Head Bolts ### [A2 Stainless Steel Solar Hanger Bolts for Timber](https://engineeringhardware.com/product/a2-stainless-steel-solar-hanger-bolts-for-timber/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST, Per Customers'desire **US$0.0672 – 0.18**MOQ 10 pieces [![Fastener Hardware Set Screw Bolt and Nut](https://img.engineeringhardware.com/Fastener-Hardware-Set-Screw-Bolt-and-Nut.webp)](https://engineeringhardware.com/product/fastener-hardware-set-screw-bolt-and-nut/) Hex-Head Bolts ### [Fastener Hardware Set Screw Bolt and Nut](https://engineeringhardware.com/product/fastener-hardware-set-screw-bolt-and-nut/) Hexagon Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.14 – 0.30**MOQ 1,000 pieces [![DIN7991 Alloy Steel Grade 10.9 Hex Socket Flat Head Screw White Zinc Plated High Quality Hexagon Bolts Countersunk Head Screw Allen Screw](https://img.engineeringhardware.com/DIN7991-Alloy-Steel-Grade-10-9-Hex-Socket-Flat-Head-Screw-White-Zinc-Plated-High-Quality-Hexagon-Bolts-Countersunk-Head-Screw-Allen-Screw.webp)](https://engineeringhardware.com/product/din7991-alloy-steel-grade-10-9-hex-socket-flat-head-screw-white-zinc-plated-high/) Hex-Head Bolts ### [DIN7991 Alloy Steel Grade 10.9 Hex Socket Flat Head Screw White Zinc Plated High Quality Hexagon Bolts Countersunk Head Screw Allen Screw](https://engineeringhardware.com/product/din7991-alloy-steel-grade-10-9-hex-socket-flat-head-screw-white-zinc-plated-high/) Drop-in Anchor · Diameter **US$0.03 – 0.036**MOQ 1,000 pieces [![Stainless Steel Fastener Hexagon Head Bolt, Single Coil Spring Lock Washer and Plain Washer Assemblies](https://img.engineeringhardware.com/Stainless-Steel-Fastener-Hexagon-Head-Bolt-Single-Coil-Spring-Lock-Washer-and-Plain-Washer-Assemblies.webp)](https://engineeringhardware.com/product/stainless-steel-fastener-hexagon-head-bolt-single-coil-spring-lock-washer-and-plain/) Hex-Head Bolts ### [Stainless Steel Fastener Hexagon Head Bolt, Single Coil Spring Lock Washer and Plain Washer Assemblies](https://engineeringhardware.com/product/stainless-steel-fastener-hexagon-head-bolt-single-coil-spring-lock-washer-and-plain/) DIN, ANSI, GB, JIS, BSW, Customized · Stainless Steel **US$0.066 – 1.20**MOQ 10,000 pieces [![Hex Socket Head Cap Bolt High Strength Fastener Supply Grade 8.8 M6*45](https://img.engineeringhardware.com/Hex-Socket-Head-Cap-Bolt-High-Strength-Fastener-Supply-Grade-8-8-M6-45.webp)](https://engineeringhardware.com/product/hex-socket-head-cap-bolt-high-strength-fastener-supply-grade-8-8-m6-45/) Hex-Head Bolts ### [Hex Socket Head Cap Bolt High Strength Fastener Supply Grade 8.8 M6*45](https://engineeringhardware.com/product/hex-socket-head-cap-bolt-high-strength-fastener-supply-grade-8-8-m6-45/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$960.00 – 1,020**MOQ 1 ton **US$0.096 – 0.12**MOQ 50,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Hex%20Socket%20Bolt%20Flat%20Head%20Hex%20Bolt%20Hex%20Socket%20Countersunk%20DIN7991%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhex-socket-bolt-flat-head-hex-bolt-hex-socket-countersunk-din7991-machine-screw%2F)