Description
Overview
DIN7 specifies the dimensional requirements for parallel pins, ensuring reliable interchangeability and engineering performance.
This selected size is specified with diameter M20, thread M20.
Sold in multiples of '100 pieces. 1 Box = '100 pieces.
Material, Grade & Strength
A2 (304) stainless steel provides excellent corrosion resistance.
Finish & Corrosion Protection
Plain finish is intended for protected indoor applications.
Typical Uses
Used in machinery, maintenance, manufacturing, agriculture, mining and general engineering applications.
Technical Tips
- Select the correct size and material for the application.
- Inspect components before installation.
- Follow recognised engineering practices and manufacturer recommendations.
Dimensions – DIN 7980 M20
| Standard | DIN 7980 |
|---|---|
| Product | Spring lock washer for socket cap screws |
| Nominal size | M20 |
| Inside diameter (d1) | 20.5 mm |
| Outside diameter (d2) | 31.2 mm |
| Thickness (s) | 5.5 mm |
| Weight (calculated) | 18.95 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Stainless steel A2 (304) |
|---|---|
| Steel grade | AISI 304 (1.4301) |
| Composition | C max 0.07%, Cr 17.5-19.5%, Ni 8.0-10.5% |
| Typical use | general corrosion resistance, indoor/outdoor, food equipment |
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 7980 data sheet – all sizes
| Size | Nominal size | Inside diameter (d1) | Outside diameter (d2) | Thickness (s) |
|---|---|---|---|---|
| M3 | M3 | 3.1 mm | 5.7 mm | 1 mm |
| M4 | M4 | 4.1 mm | 7.1 mm | 1.2 mm |
| M5 | M5 | 5.1 mm | 8.7 mm | 1.6 mm |
| M6 | M6 | 6.1 mm | 11.1 mm | 2 mm |
| M8 | M8 | 8.2 mm | 14.2 mm | 2.5 mm |
| M10 | M10 | 10.2 mm | 17.2 mm | 3 mm |
| M12 | M12 | 12.3 mm | 20.2 mm | 3.5 mm |
| M16 | M16 | 16.3 mm | 26.2 mm | 4.5 mm |
| M20 | M20 | 20.5 mm | 31.2 mm | 5.5 mm |
| M24 | M24 | 24.5 mm | 38.5 mm | 6.5 mm |
Nominal dimensions per DIN 7980. 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 | M20 |
| Inner Diameter | 20.7 mm |
| Outer Diameter | 30.6 mm |
| Diameter | M20 |
| Thickness | 9 |
| Material | Stainless Steel |
| Finish | Plain |
| Grade | Grade (A2) |
| Standards Met | DIN 7980 |
| Package Quantity | 100 |
| Package Type | Box |