--- title: "Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws" description: "Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws — Countersunk & Flat-Head Machine Screws. MOQ 10,000 pieces, US$0.70." url: https://engineeringhardware.com/product/multipurpose-titanium-tc4-din7991-hexagon-socket-countersunk-head-screws/ source: Engineering Hardware & Fasteners --- # Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws [![Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws](https://img.engineeringhardware.com/Multipurpose-Titanium-Tc4-DIN7991-Hexagon-Socket-Countersunk-Head-Screws.webp)](https://img.engineeringhardware.com/Multipurpose-Titanium-Tc4-DIN7991-Hexagon-Socket-Countersunk-Head-Screws.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/multipurpose-titanium-tc4-din7991-hexagon-socket-countersunk-head-screws.md) Model no. **DIN7991** US$0.70 / piece MOQ 10,000 pieces · Final price confirmed in your quote - **Head Style:** Counter Sunk Bolt - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** 10.9 - **Customize:** Yes - **Package Size:** 26.00cm * 26.00cm * 10.00cm - **Material:** Titanium/Titanium Alloy Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Multipurpose%20Titanium%20Tc4%20DIN7991%20Hexagon%20Socket%20Countersunk%20Head%20Screws%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fmultipurpose-titanium-tc4-din7991-hexagon-socket-countersunk-head-screws%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 | Model NO. | DIN7991 | | --- | --- | | Groove | Hexagon | | Connection | Common Bolt | | Head Style | Counter Sunk Bolt | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | 10.9 | | Customize | Yes | | OEM ODM | Yes | | Transport Package | Carton and Pallet | | Specification | M1.6-M10 or OEM | | Origin | Shanghai | | HS Code | 7318150001 | | Production Capacity | 5000000 | | Package Size | 26.00cm * 26.00cm * 10.00cm | | Package Gross Weight | 3.000kg | | Customization | Available | | Material | Titanium/Titanium Alloy | | Type | Countersunk Head | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | Product Name | Machine Screw | | --- | --- | | Material | Titanium | | Color | self-color, Anodized | | Standard | DIN GB ISO JIS ANSI UNI | | Finished | Plain, Anodized | | Screw Thread | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | d | | | | | | | | | | | | | | | | P | Pitch | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | | α | tol.(+2) | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 60° | 60° | | b | L≤125mm | 12 | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | | 125 | / | / | / | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | | | L>200 | / | / | / | / | / | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | | | dk | max=nominal size | 6 | 8 | 10 | 12 | 16 | 20 | 24 | 27 | 30 | 33 | 36 | 36 | 39 | | min | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | 26.48 | 29.48 | 32.38 | 35.38 | 35.38 | 38.38 | | | ds | max=nominal size | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | | min | 2.86 | 3.82 | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 17.73 | 19.67 | 21.67 | 23.67 | | | e | min | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | 16 | 16 | | k | max | 1.7 | 2.3 | 2.8 | 3.3 | 4.4 | 5.5 | 6.5 | 7 | 7.5 | 8 | 8.5 | 13.1 | 14 | | s | Nominal Size | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 14 | 14 | | min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | 14.032 | 14.032 | | | max | 2.1 | 2.6 | 3.1 | 4.12 | 5.14 | 6.14 | 8.175 | 10.175 | 10.175 | 12.212 | 12.212 | 14.212 | 14.212 | | | t | max=nominal size | 1.2 | 1.8 | 2.3 | 2.5 | 3.5 | 4.4 | 4.6 | 4.8 | 5.3 | 5.5 | 5.9 | 8.8 | 10.3 | | min | 0.95 | 1.55 | 2.05 | 2.25 | 3.2 | 4.1 | 4.3 | 4.5 | 5 | 5.2 | 5.6 | 8.44 | 9.87 | | | Weight of per 1000 steel products(≈kg) | - | - | - | | | | | | | | | | | | | Length of Thread b | - | - | | | | | | | | | | | | | ## Description Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Countersunk Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Titanium/Titanium Alloy - **Grade:** 10.9 - **Head Style:** Counter Sunk Bolt - **Groove:** Hexagon - **Connection:** Common Bolt - **OEM ODM:** Yes Available configurations include head style, standard, grade, customize and package 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$0.70 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 Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws? The listed minimum order is 10,000 pieces, at US$0.70 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 Multipurpose Titanium Tc4 DIN7991 Hexagon Socket Countersunk Head Screws? Type: Countersunk Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Titanium/Titanium Alloy; Grade: 10.9; Head Style: Counter Sunk Bolt; Groove: Hexagon. 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, customize 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 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/) [![Stainless Steel Counersunk Head Pin Flat Screw Cross Head Machine Screws Cross Countersunk Head Electronic Precision Screws](https://img.engineeringhardware.com/Stainless-Steel-Counersunk-Head-Pin-Flat-Screw-Cross-Head-Machine-Screws-Cross-Countersunk-Head-Electronic-Precision-Screws.webp)](https://engineeringhardware.com/product/stainless-steel-counersunk-head-pin-flat-screw-cross-head-machine-screws-cross/) Countersunk & Flat-Head Machine Screws ### [Stainless Steel Counersunk Head Pin Flat Screw Cross Head Machine Screws Cross Countersunk Head Electronic Precision Screws](https://engineeringhardware.com/product/stainless-steel-counersunk-head-pin-flat-screw-cross-head-machine-screws-cross/) Countersunk Head · DIN, GB, ANSI, 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quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Multipurpose%20Titanium%20Tc4%20DIN7991%20Hexagon%20Socket%20Countersunk%20Head%20Screws%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fmultipurpose-titanium-tc4-din7991-hexagon-socket-countersunk-head-screws%2F)