--- title: "DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt" description: "DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt — Countersunk, Plow & Elevator Bolts. MOQ 1,000 pieces, US$0.012 – 0.036." url: https://engineeringhardware.com/product/din7991-countersunk-hexagon-socket-head-screw-machine-screw-bolt/ source: Engineering Hardware & Fasteners --- # DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt [![DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt](https://img.engineeringhardware.com/DIN7991-Countersunk-Hexagon-Socket-Head-Screw-Machine-Screw-Bolt.webp)](https://img.engineeringhardware.com/DIN7991-Countersunk-Hexagon-Socket-Head-Screw-Machine-Screw-Bolt.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Countersunk, Plow & Elevator Bolts](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) Updated 2026-11-03 · [Markdown version](https://engineeringhardware.com/product/din7991-countersunk-hexagon-socket-head-screw-machine-screw-bolt.md) Model no. **DIN 7991** | **US$0.036**1,000–2,999 pieces | **US$0.012**3,000+ pieces | | --- | --- | MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Round - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** 10.9 - **Model Number:** Custom - **Size:** M3-M12,Custom - **Package Size:** 25.00cm * 25.00cm * 20.00cm - **Standard parts:** 7-15days 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%20Countersunk%20Hexagon%20Socket%20Head%20Screw%20Machine%20Screw%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-countersunk-hexagon-socket-head-screw-machine-screw-bolt%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 | Carbon Steel | | Type | Flat Head | | Model NO. | DIN 7991 | | Groove | Hexagon Socket | | Connection | Screw | | Head Style | Round | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | 10.9 | | MOQ | 1000PCS | | Delivery Time | 15-30 Days | | Payment Term | Tt 30% Deposit | | Model Number | Custom | | Size | M3-M12,Custom | | Transport Package | Bag or Caton | | Specification | 25*25*15 | | Origin | Hebei | | Package Size | 25.00cm * 25.00cm * 20.00cm | | Package Gross Weight | 25.000kg | | All our processes strictly adhere to ISO9001 | 2008 procedures. We have strict quality control from producing to delivery.Our company had strong technology support, We have cultivated a group of managers who are familiar with product quality , good at modern concept of management. | | Standard parts | 7-15days | | Non-standard parts | 15-25days | | Category | [Countersunk, Plow & Elevator Bolts](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) | ## Technical parameters | Finish | Plain, Black Oxide | Material | Steel | | --- | --- | --- | --- | | Grade | 4.8 6.8 8.8 10.9 12.9 | Place of origin | Hebei, China | | Material | Carbon steel | Delivery time | 15-30 | | Head Type | Round head | Color | Zinc | ## Description DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt is part of our countersunk, plow & elevator bolts range (Bolts). ### Key details - **Type:** Flat Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Carbon Steel - **Grade:** 10.9 - **Size:** M3-M12,Custom - **Head Style:** Round - **Groove:** Hexagon Socket - **Connection:** Screw Available configurations include material, head style, standard, grade and model number. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces at US$0.012 – 0.036 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 Countersunk Hexagon Socket Head Screw Machine Screw Bolt? The listed minimum order is 1,000 pieces, at US$0.012 – 0.036 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$0.036 for 1,000–2,999 pieces; US$0.012 for 3,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of DIN7991 Countersunk Hexagon Socket Head Screw Machine Screw Bolt? Type: Flat Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Carbon Steel; Grade: 10.9; Size: M3-M12,Custom; 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 model number. 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, plow & elevator bolts are available? The Countersunk, Plow & Elevator Bolts category lists 533 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-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 Countersunk, Plow & Elevator Bolts →](https://engineeringhardware.com/fastener-products/bolts/countersunk-plow-elevator-bolts/) [![Slotted Countersunk Head Bolt Cns 4420 Galvanized Steel Flat Head Screw](https://img.engineeringhardware.com/Slotted-Countersunk-Head-Bolt-Cns-4420-Galvanized-Steel-Flat-Head-Screw.webp)](https://engineeringhardware.com/product/slotted-countersunk-head-bolt-cns-4420-galvanized-steel-flat-head-screw/) Countersunk, Plow & Elevator Bolts ### [Slotted Countersunk Head Bolt Cns 4420 Galvanized Steel Flat Head Screw](https://engineeringhardware.com/product/slotted-countersunk-head-bolt-cns-4420-galvanized-steel-flat-head-screw/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.072 – 0.12**MOQ 1,000 pieces [![DIN7991 Flat Head Countersunk Screws 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for Expansion Bolt and Nut](https://img.engineeringhardware.com/Ss-Countersunk-Head-Cooper-Nickel-Coating-Machine-Screws-for-Expansion-Bolt-and-Nut.webp)](https://engineeringhardware.com/product/ss-countersunk-head-cooper-nickel-coating-machine-screws-for-expansion-bolt-and-nut/) Countersunk, Plow & Elevator Bolts ### [Ss Countersunk Head Cooper Nickel Coating Machine Screws for Expansion Bolt and Nut](https://engineeringhardware.com/product/ss-countersunk-head-cooper-nickel-coating-machine-screws-for-expansion-bolt-and-nut/) Countersunk Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.012 – 1.20**MOQ 100,000 pieces [![Galvanized Ring Groove Rivets Countersunk Head Lockbolt Rivet Hucklok Rivets](https://img.engineeringhardware.com/Galvanized-Ring-Groove-Rivets-Countersunk-Head-Lockbolt-Rivet-Hucklok-Rivets.webp)](https://engineeringhardware.com/product/galvanized-ring-groove-rivets-countersunk-head-lockbolt-rivet-hucklok-rivets/) Countersunk, Plow & Elevator Bolts ### [Galvanized Ring 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Bolts](https://img.engineeringhardware.com/ISO7380-Stainless-Steel-Round-Countersunk-Hexagon-Socket-Flat-Head-Bolts.webp)](https://engineeringhardware.com/product/iso7380-stainless-steel-round-countersunk-hexagon-socket-flat-head-bolts/) Countersunk, Plow & Elevator Bolts ### [ISO7380 Stainless Steel Round Countersunk Hexagon Socket Flat Head Bolts](https://engineeringhardware.com/product/iso7380-stainless-steel-round-countersunk-hexagon-socket-flat-head-bolts/) Pan Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.012 – 0.024**MOQ 1,000 pieces **US$0.012 – 0.036**MOQ 1,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20DIN7991%20Countersunk%20Hexagon%20Socket%20Head%20Screw%20Machine%20Screw%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fdin7991-countersunk-hexagon-socket-head-screw-machine-screw-bolt%2F)