Description
Overview
Hexagon Socket Countersunk Head Screws to DIN 7991, Alloy Grade 10.9, Zinc Plated, size M8 x 40 MM.
Sold per piece. Screwman code CCHTZP840H.
Finish & Corrosion Protection
Zinc plated (clear/blue passivated). Electroplated zinc, typically 5-8 um (ISO 4042). Economical protection for dry indoor and light outdoor use; white rust in neutral salt spray typically from ~24-72 h depending on passivate.
Data Sheet
Dimensions – DIN 7991 / ISO 10642 M8 x 40
| Standard | DIN 7991 / ISO 10642 |
|---|---|
| Product | Hexagon socket countersunk screw |
| Thread | M8 x 1.25 |
| Length (l) | 40 mm (overall, incl. head) |
| Head diameter (dk) | 16 mm |
| Head height (k) | 4.4 mm |
| Hex key (s) | 5 mm |
| Weight (calculated) | 14.86 kg per 1 000 pieces |
Material, Grade & Strength
| Material | High tensile alloy steel, property class 10.9 |
|---|---|
| Property class | 10.9 |
| Tensile strength Rm (min) | 1040 MPa |
| Yield / 0.2% proof Rp0.2 (min) | 940 MPa |
| Proof load stress | 830 MPa |
| Hardness | 320-380 HV |
| Elongation after fracture (min) | 9 % |
| Matching nut | property class 10 (ISO 898-2) |
Finish & Corrosion Protection
Zinc plated (clear/blue passivated): Electroplated zinc, typically 5-8 um (ISO 4042). Economical protection for dry indoor and light outdoor use; white rust in neutral salt spray typically from ~24-72 h depending on passivate.
DIN 7991 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Hex key (s) |
|---|---|---|---|---|
| M3 | M3 x 0.5 | 6 mm | 1.7 mm | 2 mm |
| M4 | M4 x 0.7 | 8 mm | 2.3 mm | 2.5 mm |
| M5 | M5 x 0.8 | 10 mm | 2.8 mm | 3 mm |
| M6 | M6 x 1 | 12 mm | 3.3 mm | 4 mm |
| M8 | M8 x 1.25 | 16 mm | 4.4 mm | 5 mm |
| M10 | M10 x 1.5 | 20 mm | 5.5 mm | 6 mm |
| M12 | M12 x 1.75 | 24 mm | 6.5 mm | 8 mm |
| M14 | M14 x 2 | 27 mm | 7 mm | 10 mm |
| M16 | M16 x 2 | 30 mm | 7.5 mm | 10 mm |
| M20 | M20 x 2.5 | 36 mm | 8.5 mm | 12 mm |
| M24 | M24 x 3 | 39 mm | 14 mm | 14 mm |
Nominal dimensions per DIN 7991 / ISO 10642. 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
No structured specifications are available yet.