Description
Overview
DIN127 defines the dimensional standard for this fastener, ensuring interchangeability and consistent installation across engineering applications.
This selected size is specified with diameter M20, thread M20.
Sold in multiples of '1000 pieces. 1 Box = '1000 pieces.
Material, Grade & Strength
Select the material and grade according to clamp load, environment and corrosion requirements.
Finish & Corrosion Protection
Zinc plating provides sacrificial corrosion protection.
Typical Uses
Suitable for machinery, fabrication, maintenance, construction and general engineering.
Technical Tips
- Select matching mating components.
- Confirm torque using recognised torque charts.
- Match material and finish to the operating environment.
Dimensions – DIN 127 B M20
| Standard | DIN 127 B |
|---|---|
| Product | Spring lock washer, square ends |
| Nominal size | M20 |
| Inside diameter (d1) | 20.2 mm |
| Outside diameter (d2) | 33.6 mm |
| Thickness (s) | 4 mm |
| Weight (calculated) | 17.78 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Spring steel |
|---|---|
| Hardness | spring steel, hardened and tempered |
Finish & Corrosion Protection
Zinc plated, yellow passivated: Electroplated zinc 5-8 um with yellow chromate/trivalent passivate; better corrosion resistance than clear zinc for the same thickness.
DIN 127 B data sheet – all sizes
| Size | Nominal size | Inside diameter (d1) | Outside diameter (d2) | Thickness (s) |
|---|---|---|---|---|
| M3 | M3 | 3.1 mm | 6.2 mm | 0.8 mm |
| M4 | M4 | 4.1 mm | 7.6 mm | 0.9 mm |
| M5 | M5 | 5.1 mm | 9.2 mm | 1.2 mm |
| M6 | M6 | 6.1 mm | 11.8 mm | 1.6 mm |
| M8 | M8 | 8.2 mm | 14.8 mm | 2 mm |
| M10 | M10 | 10.2 mm | 18.1 mm | 2.2 mm |
| M12 | M12 | 12.2 mm | 21.1 mm | 2.5 mm |
| M14 | M14 | 14.2 mm | 24.1 mm | 3 mm |
| M16 | M16 | 16.2 mm | 27.4 mm | 3.5 mm |
| M18 | M18 | 18.2 mm | 29.4 mm | 3.5 mm |
| M20 | M20 | 20.2 mm | 33.6 mm | 4 mm |
| M22 | M22 | 22.5 mm | 35.9 mm | 4 mm |
| M24 | M24 | 24.5 mm | 40 mm | 5 mm |
| M27 | M27 | 27.5 mm | 43 mm | 5 mm |
| M30 | M30 | 30.5 mm | 48.2 mm | 6 mm |
| M36 | M36 | 36.5 mm | 58.2 mm | 6 mm |
Nominal dimensions per DIN 127 B. 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 | 21.2 |
| Outer Diameter | 33.6 |
| Diameter | M20 |
| Thickness | 9.4 |
| Material | Spring Steel |
| Finish | Zinc Plated & Yellow Passivated |
| Grade | Grade 4.8 |
| Standards Met | DIN 127 |
| Package Quantity | 1000 |
| Package Type | Box |