---
title: "Reamer Hex Socket Chess Head Captive Bolt with Knurling"
description: "Reamer Hex Socket Chess Head Captive Bolt with Knurling — Quarter-Turn, Captive & Panel Fasteners. MOQ 50 pieces, US$0.036."
url: https://engineeringhardware.com/product/reamer-hex-socket-chess-head-captive-bolt-with-knurling/
source: Engineering Hardware & Fasteners
---

# Reamer Hex Socket Chess Head Captive Bolt with Knurling

[![Reamer Hex Socket Chess Head Captive Bolt with Knurling](https://img.engineeringhardware.com/Reamer-Hex-Socket-Chess-Head-Captive-Bolt-with-Knurling.webp)](https://img.engineeringhardware.com/Reamer-Hex-Socket-Chess-Head-Captive-Bolt-with-Knurling.webp)

- Standard & made-to-drawing parts
- Checked before shipping
- Air, sea & express delivery

[Specialty Fasteners › Quarter-Turn, Captive & Panel Fasteners](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/)

Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/reamer-hex-socket-chess-head-captive-bolt-with-knurling.md)

Model no. **DIN/ISO/GB**

US$0.036 / piece

MOQ 50 pieces · Final price confirmed in your quote

- **Grade:** A2-70 A4-70
- **Head Type:** Socket Head
- **Material:** Stainless Steel
- **Standard:** DIN, GB
- **Thread:** Unc
- **Color:** Silver White
- **Head Style:** Chess
- **Package Size:** 28.00cm * 27.00cm * 18.00cm

Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Reamer%20Hex%20Socket%20Chess%20Head%20Captive%20Bolt%20with%20Knurling%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Freamer-hex-socket-chess-head-captive-bolt-with-knurling%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. | DIN/ISO/GB |
| --- | --- |
| Grade | A2-70 A4-70 |
| Head Type | Socket Head |
| Material | Stainless Steel |
| Standard | DIN, GB |
| Product Name | DIN912 Screws |
| Drawing | Accept |
| Sample | Free Sample When Is in Stock |
| Thread | Unc |
| Service | Custom-Made Service |
| Color | Silver White |
| Type | Cheese Head |
| Groove | Hexagon |
| Connection | Common Bolt |
| Head Style | Chess |
| Transport Package | Plastic Bags and Cartons |
| Specification | M3-M30 |
| Origin | China |
| HS Code | 7318160000 |
| Production Capacity | 3000000 Pieces/ Month |
| Package Size | 28.00cm * 27.00cm * 18.00cm |
| Package Gross Weight | 18.200kg |
| Lead Time | 7 days (1 - 1000 Pieces) To be negotiated ( > 1000 Pieces) |
| Customization | Available |
| Drive Type | Hex Socket Drive |
| Finish | Passivated |
| Shipping Cost | Contact the supplier about freight and estimated delivery time. |
| What is captive screw | A captive screw is designed to prevent this from occurring. It can freely rotate within the first component, with some axial movement, but it's unable to separate from it. Captive screws are used when fasteners must remain attached to equipment, such as in cover panels. They are a requirement for several machinery safety standards. |
| Category | [Quarter-Turn, Captive & Panel Fasteners](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/) |

## Technical parameters

| Standard | DIN 7964 (E) |
| --- | --- |
| Diameter | #2-1/2" & M3-M30;Customized |
| sample service | Free sample but freight cost is paid by customers(when sample is in stock) sample fee(when samples need to be customized) |
| Material | SS304,SS316,SS2205,SS2507 |
| MOQ | 1000 |
| Surface treatment | Plain, black oxide |
| Package | Plastic bag, Boxes and cartons, Pallets, Customized |
| Price terms | EXW, FOB, CIF, etc. |
| Payment terms | T/T, Paypal, L/C, Western union, etc. |
| Certifications | ISO 9001 |
| Note | Free Samples could be provided for standard fastener |

| Thread Size d | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 | M20 | M24 | M30 |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| P | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 |  |  |
| b1 | 0 ~ +2P | type K / short thread | 3.2 | 3.8 | 5 | 6.25 | 7.5 | 10 | 12.5 | 15 | 20 | 25 | 30 | 38 |
| type L / long thread | 10 | 12 | 14 | 16 | 18 | 22 | 26 | 30 | 38 | 46 | 54 | 66 |  |  |
| b2 | 0 ~ +2P | type K / short thread | 3.75 | 4.5 | 6 | 7.55 | 8.5 | 11.2 | 14.3 | 17.5 | 23 | 28.5 | 33.5 | 43 |
| type L / long thread | 10.55 | 12.7 | 15 | 17.3 | 19 | 23.2 | 27.8 | 32.5 | 41 | 49.5 | 57.5 | 71 |  |  |
| ds | max | 1.9 | 2.3 | 3 | 3.9 | 4.6 | 6.2 | 7.7 | 9.2 | 12.7 | 16.2 | 19.2 | 24.2 |  |
| min | 1.7 | 2.1 | 2.8 | 3.7 | 4.4 | 6 | 7.5 | 9 | 12.5 | 16 | 19 | 24 |  |  |
| r | min | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.8 | 0.8 | 1 |  |
| dk | max | For plain head | 4.5 | 5.5 | 7 | 8.5 | 10 | 13 | 16 | 18 | 24 | 30 | 36 | 45 |
| For knurled heads | 4.68 | 5.68 | 7.22 | 8.72 | 10.22 | 13.27 | 16.27 | 18.27 | 24.33 | 30.33 | 36.39 | 45.39 |  |  |
| min | 4.32 | 5.32 | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | 17.73 | 23.67 | 29.67 | 35.61 | 44.61 |  |  |
| e | min | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 16 | 19.44 | 21.73 | 25.15 |  |
| k | max | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 | 24 | 30 |  |
| min | 2.36 | 2.86 | 3.82 | 4.82 | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | 29.48 |  |  |
| s | Nominal Size | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 14 | 17 | 19 | 22 |  |
| min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 14.032 | 17.05 | 19.065 | 22.065 |  |  |
| max | 2.06 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 | 14.212 | 17.23 | 19.275 | 22.275 |  |  |
| t | min | 1.1 | 1.3 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 15.5 |  |

## Description

Reamer Hex Socket Chess Head Captive Bolt with Knurling is part of our quarter-turn, captive & panel fasteners range (Specialty Fasteners).

### Key details

- **Type:** Cheese Head
- **Standard:** DIN, GB
- **Material:** Stainless Steel
- **Grade:** A2-70 A4-70
- **Thread:** Unc
- **Head Type:** Socket Head
- **Head Style:** Chess
- **Groove:** Hexagon

Available configurations include grade, head type, material, standard and thread. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

### Ordering through Engineering Hardware & Fasteners

Minimum order is 50 pieces at US$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 Reamer Hex Socket Chess Head Captive Bolt with Knurling?

The listed minimum order is 50 pieces, at US$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.

### What are the main specifications of Reamer Hex Socket Chess Head Captive Bolt with Knurling?

Type: Cheese Head; Standard: DIN, GB; Material: Stainless Steel; Grade: A2-70 A4-70; Thread: Unc; Head Type: Socket Head. The full specification table and any technical parameter tables are listed on this page.

### Can this product be customized (OEM)?

Listed configurations include grade, head type, material, standard 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 quarter-turn, captive & panel fasteners are available?

The Quarter-Turn, Captive & Panel Fasteners category lists 403 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/](https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/)

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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