---
title: "Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw"
description: "Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Qu… — Socket Head Cap & Allen Screws."
url: https://engineeringhardware.com/product/black-gr12-9-din7991-csk-socket-head-machine-screw-flat-countersunk-socket-screw/
source: Engineering Hardware & Fasteners
---

# Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw

[![Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw](https://img.engineeringhardware.com/Black-Gr12-9-DIN7991-Csk-Socket-Head-Machine-Screw-Flat-Countersunk-Socket-Screw-High-Quality-Flat-Socket-Screw.webp)](https://img.engineeringhardware.com/Black-Gr12-9-DIN7991-Csk-Socket-Head-Machine-Screw-Flat-Countersunk-Socket-Screw-High-Quality-Flat-Socket-Screw.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/black-gr12-9-din7991-csk-socket-head-machine-screw-flat-countersunk-socket-screw.md)

Model no. **M2-M12**

| **US$0.036**10,000–49,999 pieces | **US$0.012**50,000–999,999 pieces | **US$0.006**1,000,000+ pieces |
| --- | --- | --- |

MOQ 10,000 pieces · Final price confirmed in your quote

- **Material:** Carbon Steel
- **Head Style:** Counter Sunk Bolt
- **Standard:** DIN, ANSI
- **Grade:** 12.9
- **Packing:** Carton + Pallet
- **Finish:** Plain, Galvanzied, Passivation ,HDG,Nickel Plated
- **Size:** M4-M24 ,or non-standard as request&design
- **Non-standards:** OEM is available, according to drawing or samples

Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Black%20Gr12.9%20DIN7991%20Csk%20Socket%20Head%20Machine%20Screw%2FFlat%20Countersunk%20Socket%20Screw%2FHigh%20Quality%20Flat%20Socket%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fblack-gr12-9-din7991-csk-socket-head-machine-screw-flat-countersunk-socket-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 | Carbon Steel |
| Type | Countersunk Head |
| Model NO. | M2-M12 |
| Groove | Cross |
| Connection | Common Bolt |
| Head Style | Counter Sunk Bolt |
| Standard | DIN, ANSI |
| Grade | 12.9 |
| Name | Black Gr12.9 DIN7991 Csk Socket Head Machine Screw |
| Samples | Free |
| Delivery Time | 7~25days |
| Payment Term | L/C&T/T |
| Packing | Carton + Pallet |
| Certification | ISO, RoHS, SGS, TUV |
| Finish | Plain, Galvanzied, Passivation ,HDG,Nickel Plated |
| Transport Package | Carton + Pallet |
| Specification | M2-m12 |
| Origin | Jiaxing Zheng, China |
| HS Code | 7318159090 |
| Production Capacity | 50ton/ Weeks |
| Size | M4-M24 ,or non-standard as request&design |
| Stainless Steel | SS303, SS304, SS316, |
| Steel | C45(K1045), C46(K1046),C20,etc. |
| Brass | C36000 ( C26800), C37700 ( HPb59), C38500( HPb58)etc. |
| Bronze | C51000, C52100, C54400, etc. |
| Iron | 1213, 12L14,1215,etc. |
| Aluminum | Al6061, Al6063, etc. |
| Alloy steel | SCM435,10B21, C10B33,etc. |
| Carbon steel | C1006,C1010,C1018,C1022,C1035K,12L14,etc. |
| Non-standards | OEM is available, according to drawing or samples |
| Heat Treatment | Tempering,Hardening,Spheroidizing,Stress Relieving. |
| ISO 9001 | 2015 and ISO 14001:2015 |
| Package | according to customers requirement |
| BOLT | DIN928,DIN933, DIN931, DIN912,DIN603,DIN7985,DIN7991,DIN6921, ASME/ANSI B 18.2.1ASME/ANSIB18.2.3.1M,GB, BSW, ISO Hex bolt , carriage bolt, heavy hex bolt, flange head bolt, achor bolt ect |
| Nut | DIN934,DIN6923,DIN985,ISO4032 hex heavy hex nut, 2H nut,A563/A563M cap nut, nylon nut, ect |
| Rod | threaded rod DIN975,DIN976, threaded bar DIN975 stud bolt, B7 stud bolt ect |
| Screw | hex screw,DIN912; self drilling screw, DIN7504; self tapping screw,DIN7981/7982; drywall screw, pan head screw, button head screw, machine screw, chipboard screw,furniture screw,wood screw, ect |
| washer | flat washer DIN125, spring washer DIN127, lock washer,square washer,spring lock washer, plain washer ect |
| Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) |

## Technical parameters

| Name: | Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw |
| --- | --- |
| Size: | M4-M24 ,or non-standard as request&design |
| Material: | Stainless Steel:SS303, SS304, SS316, |
| Steel:C45(K1045), C46(K1046),C20,etc. |  |
| Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58)etc. |  |
| Bronze: C51000, C52100, C54400, etc. |  |
| Iron: 1213, 12L14,1215,etc. |  |
| Aluminum: Al6061, Al6063, etc. |  |
| Alloy steel: SCM435,10B21, C10B33,etc. |  |
| Carbon steel: C1006,C1010,C1018,C1022,C1035K,12L14,etc. |  |
| Grade: | a2 a4etc |
| Standard: | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc |
| Non-standards: | OEM is available, according to drawing or samples |
| Heat Treatment: | Tempering,Hardening,Spheroidizing,Stress Relieving. |
| Finish: | Plain, black, zinc plated/according to your requirement |
| Certification: | ISO 9001:2015 and ISO 14001:2015 |
| Package: | according to customers requirement |

## Description

Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw is part of our socket head cap & allen screws range (Screws).

### Key details

- **Type:** Countersunk Head
- **Standard:** DIN, ANSI
- **Material:** Carbon Steel
- **Grade:** 12.9
- **Size:** M4-M24 ,or non-standard as request&design
- **Head Style:** Counter Sunk Bolt
- **Groove:** Cross
- **Finish:** Plain, Galvanzied, Passivation ,HDG,Nickel Plated

Available configurations include material, head style, standard, grade and packing. 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$0.006 – 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 Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw?

The listed minimum order is 10,000 pieces, at US$0.006 – 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 10,000–49,999 pieces; US$0.012 for 50,000–999,999 pieces; US$0.006 for 1,000,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote.

### What are the main specifications of Black Gr12.9 DIN7991 Csk Socket Head Machine Screw/Flat Countersunk Socket Screw/High Quality Flat Socket Screw?

Type: Countersunk Head; Standard: DIN, ANSI; Material: Carbon Steel; Grade: 12.9; Size: M4-M24 ,or non-standard as request&design; 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 material, head style, standard, grade and packing. 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

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