Description
Overview
DIN603 defines the dimensional standard for this fastener, ensuring interchangeability and consistent installation across engineering applications.
This selected size is specified with diameter M20, length 100 mm, thread M20, pitch 2.5 mm.
Sold in multiples of '1 pieces. 1 Box = '1 pieces.
Material, Grade & Strength
Select the material and grade according to clamp load, environment and corrosion requirements.
Finish & Corrosion Protection
Plain finish is intended for protected environments.
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 603 / ISO 8677 M20 x 100
| Standard | DIN 603 / ISO 8677 |
|---|---|
| Product | Mushroom (cup) head square neck bolt |
| Thread | M20 x 2.5 |
| Length (l) | 100 mm |
| Head diameter (dk) | 46.8 mm |
| Head height (k) | 11.05 mm |
| Square neck | 20 x 20 mm |
| Weight (calculated) | 333.41 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Mild steel (grade 4.6/4.8) |
|---|---|
| Property class | 4.6 / 4.8 (mild steel) |
| Tensile strength Rm (min) | 400 / 420 MPa |
| Yield strength (min) | 240 / 340 MPa |
| Proof load stress | 225 / 310 MPa |
| Matching nut | property class 5 (ISO 898-2) |
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 603 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Square neck |
|---|---|---|---|---|
| M5 | M5 x 0.8 | 13.55 mm | 3.3 mm | 5 x 5 mm |
| M6 | M6 x 1 | 16.55 mm | 3.88 mm | 6 x 6 mm |
| M8 | M8 x 1.25 | 20.65 mm | 4.88 mm | 8 x 8 mm |
| M10 | M10 x 1.5 | 24.65 mm | 5.38 mm | 10 x 10 mm |
| M12 | M12 x 1.75 | 30.65 mm | 6.95 mm | 12 x 12 mm |
| M16 | M16 x 2 | 38.8 mm | 8.95 mm | 16 x 16 mm |
| M20 | M20 x 2.5 | 46.8 mm | 11.05 mm | 20 x 20 mm |
Nominal dimensions per DIN 603 / ISO 8677. 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 |
| Thread Pitch | 2.5 mm |
| Head Style | Cup |
| Diameter | M20 |
| Length | 100 mm |
| Material | Mild Steel |
| Finish | Plain |
| Grade | Grade 4.8 |
| Standards Met | DIN 603 |
| Package Quantity | 1 |
| Package Type | Box |