---
title: "Premium Black Carbon Steel Hex Socket Countersunk Head Screws"
description: "Premium Black Carbon Steel Hex Socket Countersunk Head Screws — Socket Head Cap & Allen Screws. MOQ 50,000 pieces, US$0.0024 – 1.20."
url: https://engineeringhardware.com/product/premium-black-carbon-steel-hex-socket-countersunk-head-screws/
source: Engineering Hardware & Fasteners
---

# Premium Black Carbon Steel Hex Socket Countersunk Head Screws

[![Premium Black Carbon Steel Hex Socket Countersunk Head Screws](https://img.engineeringhardware.com/Premium-Black-Carbon-Steel-Hex-Socket-Countersunk-Head-Screws.webp)](https://img.engineeringhardware.com/Premium-Black-Carbon-Steel-Hex-Socket-Countersunk-Head-Screws.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/premium-black-carbon-steel-hex-socket-countersunk-head-screws.md)

US$0.0024 – 1.20 / piece

MOQ 50,000 pieces · Final price confirmed in your quote

- **Head Style:** Round
- **Standard:** DIN, ANSI, GB, JIS, BSW, GOST, Customized
- **Grade:** 6.8
- **Finish:** Black
- **Thread:** Customized
- **Can It Be Customized:** Yes
- **Package Size:** 10.00cm * 5.00cm * 5.00cm
- **Material:** Carbon Steel

Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Premium%20Black%20Carbon%20Steel%20Hex%20Socket%20Countersunk%20Head%20Screws%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fpremium-black-carbon-steel-hex-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

| Connection | Common Bolt |
| --- | --- |
| Head Style | Round |
| Standard | DIN, ANSI, GB, JIS, BSW, GOST, Customized |
| Grade | 6.8 |
| Application | Machinery, Chemical Industry, Environmental, Building |
| Finish | Black |
| Thread | Customized |
| Reject Ratio | 300ppm |
| Can It Be Customized | Yes |
| Transport Package | Ocean Shipping |
| Origin | China |
| HS Code | 731815900 |
| Production Capacity | 500 Million/Year |
| Package Size | 10.00cm * 5.00cm * 5.00cm |
| Package Gross Weight | 1.000kg |
| Customization | Available |
| Material | Carbon Steel |
| Type | Countersunk Head |
| Shipping Cost | Contact the supplier about freight and estimated delivery time. |
| Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) |

## Technical parameters

| Product name | Hexagon socket countersunk head screws |
| --- | --- |
| Standards | GB, DIN, JIS, ASME, ISO,BSW,GOST, Customized parts per drawing |
| Thread | Metric Coarse, Metric Fine, UNC, UNF,BSW, BSF,etc |
| Grades | 4.8, 5.6, 6.8,8.8, 9.8, 10.9, 12.9 |
| Surface Treatment | Plain, Black, Zinc Plated (ZP),Yellow Zinc Plated and Hot DIP Galvanizing (H.D.G), Dacromet, Nickel plated,Zinc nickel alloy, Brass plated |
| Precoating | NYLOK, Bolt fastening glue, leak proof glue or per customer request |
| Material | Carbon steel, Alloy steel, stainless steel, Aluminum, Copper,etc |
| Packing | Plastic bags or small box per carton. Cartons bulk per pallet |
| Label | Standard small labels for each bag/small box, standard large labels for each box. Customized labels |
| Certification | ISO9001, ROHS, REACH ,IATF16949 |
| Loading Port | Zhongshan Port, Shenzhen Port |
| Payment Term | Made-in-China Global pay, T/T, L/C |
| Usage scenario | Machinery,Chemical Industry,Environmental,Building,Motors,Other |
| Place of origin | Zhongshan City, Guangdong Province, China |
| HS code | 73181590 |
| Annual production capacity | 400 Million/Year |
| Reject ratio | 300PPM |
| Whether to provide samples | Yes |
| Can it be customized | Yes |

| (mm) | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| P | 0.35\ | 0.5 | 0.5\ | 0.7 | 0.5\ | 0.8 | 0.75\ | 1 | 1\ | 1.25 | 1\ | 1.25\ | 1.5 | 1\ | 1.25\ | 1.5\ | 1.75 | 1\ | 1.5\ | 2 |
| h max | 0.7 | 0.8 | 1 | 1.2 | 1.5 | 2 | 2.4 | 2.8 |  |  |  |  |  |  |  |  |  |  |  |  |
| h min | 0.55 | 0.65 | 0.8 | 1 | 1.25 | 1.7 | 2.1 | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |
| da max | 3.6 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 17.7 |  |  |  |  |  |  |  |  |  |  |  |  |
| dc max | 6.9 | 9.4 | 11.8 | 13.6 | 17.8 | 21.9 | 26 | 34 |  |  |  |  |  |  |  |  |  |  |  |  |
| dc min | 6.32 | 8.82 | 11.1 | 12.9 | 17.1 | 21.06 | 25.16 | 33 |  |  |  |  |  |  |  |  |  |  |  |  |
| dk max | 5.2 | 7.2 | 8.8 | 10 | 13.2 | 16.5 | 19.4 | 26 |  |  |  |  |  |  |  |  |  |  |  |  |
| dk min | 4.9 | 6.8 | 8.4 | 9.6 | 12.8 | 16.1 | 18.9 | 25.5 |  |  |  |  |  |  |  |  |  |  |  |  |
| e min | 2.303 | 2.873 | 3.443 | 4.583 | 5.723 | 6.863 | 9.149 | 11.429 |  |  |  |  |  |  |  |  |  |  |  |  |
| k max | 1.65 | 2.2 | 2.75 | 3.3 | 4.4 | 5.5 | 6.6 | 8.8 |  |  |  |  |  |  |  |  |  |  |  |  |
| k min | 1.4 | 1.95 | 2.5 | 3 | 4.1 | 5.2 | 6.24 | 8.44 |  |  |  |  |  |  |  |  |  |  |  |  |
| r min | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |
| s max | 2.08 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 |  |  |  |  |  |  |  |  |  |  |  |  |
| s min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 |  |  |  |  |  |  |  |  |  |  |  |  |
| t min | 1.04 | 1.3 | 1.56 | 2.08 | 2.6 | 3.12 | 4.16 | 5.2 |  |  |  |  |  |  |  |  |  |  |  |  |

## Description

Premium Black Carbon Steel Hex Socket Countersunk Head Screws is part of our socket head cap & allen screws range (Screws).

### Key details

- **Type:** Countersunk Head
- **Standard:** DIN, ANSI, GB, JIS, BSW, GOST, Customized
- **Material:** Carbon Steel
- **Grade:** 6.8
- **Thread:** Customized
- **Head Style:** Round
- **Finish:** Black
- **Connection:** Common Bolt

Available configurations include head style, standard, grade, finish and thread. 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$0.0024 – 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 Premium Black Carbon Steel Hex Socket Countersunk Head Screws?

The listed minimum order is 50,000 pieces, at US$0.0024 – 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 Premium Black Carbon Steel Hex Socket Countersunk Head Screws?

Type: Countersunk Head; Standard: DIN, ANSI, GB, JIS, BSW, GOST, Customized; Material: Carbon Steel; Grade: 6.8; Thread: Customized; 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 head style, standard, grade, finish and thread. 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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**US$0.0024 – 1.20**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%20Premium%20Black%20Carbon%20Steel%20Hex%20Socket%20Countersunk%20Head%20Screws%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fpremium-black-carbon-steel-hex-socket-countersunk-head-screws%2F)