Description
Overview
DIN 912 (equivalent to ISO 4762) defines a hexagon socket cap screw with a cylindrical head and full thread. The internal hex drive allows high tightening torque while requiring minimal clearance around the head, making it one of the most widely used fasteners in machinery and precision engineering.
This selected size is specified with diameter M6, length 40 mm, thread M6, pitch 1 mm.
Sold in multiples of '100 pieces. 1 Box = '100 pieces.
Material, Grade & Strength
A4 (316) stainless steel provides superior corrosion resistance for marine and chemical environments.
Finish & Corrosion Protection
Corrosion resistance is provided by the stainless steel material.
Typical Uses
Commonly used in machine tools, moulds, dies, automation equipment, fixtures, hydraulic systems and industrial machinery.
Technical Tips
- Use the correct hex key or socket bit.
- Counterbored holes provide full seating.
- Follow recognised torque charts for the selected size and grade.
Selection Advice
Select DIN 912 where high tightening torque and a compact head design are required.
Frequently Asked Questions
What is the difference between DIN 912 and ISO 4762? ISO 4762 replaced DIN 912 internationally and the dimensions are generally interchangeable.
Dimensions – DIN 912 / ISO 4762 M6 x 40
| Standard | DIN 912 / ISO 4762 |
|---|---|
| Product | Hexagon socket head cap screw |
| Thread | M6 x 1 |
| Length (l) | 40 mm |
| Head diameter (dk) | 10 mm |
| Head height (k) | 6 mm |
| Hex key (s) | 5 mm |
| Thread length (b) | 24 mm (ref.) |
| Weight (calculated) | 10.99 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Stainless steel A4 (316) |
|---|---|
| Steel grade | AISI 316 (1.4401) |
| Composition | C max 0.07%, Cr 16.5-18.5%, Ni 10.0-13.0%, Mo 2.0-2.5% |
| Property class | A4-70 (ISO 3506) unless marked -80 |
| Tensile strength Rm (min) | 700 MPa (class 70), 800 MPa (class 80) |
| Yield Rp0.2 (min) | 450 MPa (class 70), 600 MPa (class 80) |
| Typical use | marine, coastal, chlorides, chemical plant |
Finish & Corrosion Protection
Plain / self colour: No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.
DIN 912 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Hex key (s) | Thread length (b) |
|---|---|---|---|---|---|
| M2 | M2 x 0.4 | 3.8 mm | 2 mm | 1.5 mm | full thread |
| M2.5 | M2.5 x 0.45 | 4.5 mm | 2.5 mm | 2 mm | full thread |
| M3 | M3 x 0.5 | 5.5 mm | 3 mm | 2.5 mm | 18 mm (ref.) |
| M4 | M4 x 0.7 | 7 mm | 4 mm | 3 mm | 20 mm (ref.) |
| M5 | M5 x 0.8 | 8.5 mm | 5 mm | 4 mm | 22 mm (ref.) |
| M6 | M6 x 1 | 10 mm | 6 mm | 5 mm | 24 mm (ref.) |
| M8 | M8 x 1.25 | 13 mm | 8 mm | 6 mm | 28 mm (ref.) |
| M10 | M10 x 1.5 | 16 mm | 10 mm | 8 mm | 32 mm (ref.) |
| M12 | M12 x 1.75 | 18 mm | 12 mm | 10 mm | 36 mm (ref.) |
| M14 | M14 x 2 | 21 mm | 14 mm | 12 mm | 40 mm (ref.) |
| M16 | M16 x 2 | 24 mm | 16 mm | 14 mm | 44 mm (ref.) |
| M18 | M18 x 2.5 | 27 mm | 18 mm | 14 mm | 48 mm (ref.) |
| M20 | M20 x 2.5 | 30 mm | 20 mm | 17 mm | 52 mm (ref.) |
| M22 | M22 x 2.5 | 33 mm | 22 mm | 17 mm | 56 mm (ref.) |
| M24 | M24 x 3 | 36 mm | 24 mm | 19 mm | 60 mm (ref.) |
| M27 | M27 x 3 | 40 mm | 27 mm | 19 mm | 66 mm (ref.) |
| M30 | M30 x 3.5 | 45 mm | 30 mm | 22 mm | 72 mm (ref.) |
| M33 | M33 x 3.5 | 50 mm | 33 mm | 24 mm | 78 mm (ref.) |
| M36 | M36 x 4 | 54 mm | 36 mm | 27 mm | 84 mm (ref.) |
Nominal dimensions per DIN 912 / ISO 4762. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.
Specifications
| Measurement Type | Metric |
|---|---|
| Thread Size | M6 |
| Thread Pitch | 1 mm |
| Thread Style | Partial Thread |
| Drive Size | 5 mm |
| Drive Type | Hex |
| Head Style | Cap |
| Diameter | M6 |
| Length | 40 mm |
| Material | Stainless Steel |
| Finish | Stainless steel |
| Grade | Grade (A4) |
| Standards Met | DIN 912 |
| Package Quantity | 100 |
| Package Type | Box |