Recommended Tightening Torque
Standard torque values for threaded rods to achieve optimal clamping force.
| Diameter | Class 4.6 (Nm) | Class 8.8 (Nm) | Class 10.9 (Nm) |
|---|---|---|---|
| M8 | 11 | 28 | 40 |
| M10 | 22 | 56 | 79 |
| M12 | 38 | 98 | 138 |
| M16 | 95 | 241 | 340 |
| M20 | 185 | 471 | 663 |
| M24 | 320 | 814 | 1146 |
Comprehensive Coatings Matrix
Protective finishes for structural, marine, and petrochemical applications.
| Coating System | Standard | Thickness | Resistance | Engineering Application |
|---|---|---|---|---|
| Zinc Plated Z/P | ISO 4042 | 5μm | Low | RoHS Compliant. Passivated with a transparent conversion layer. Recommended for indoor and noncorrosive environments. |
Allthread Structural Capacity Matrix
Minimum Proof Load (kN) across standard commercial and high-tensile classes.
| Size | Stress Area (mm²) | Class 4.6 (kN) | Class 8.8 (kN) | Class 10.9 (kN) |
|---|---|---|---|---|
| M12 | 84.30 | 19.00 | 48.90 | 70.00 |
| M16 | 157.00 | 35.30 | 91.10 | 130.30 |
| M20 | 245.00 | 55.10 | 147.00 | 203.30 |
| M24 | 353.00 | 79.40 | 211.80 | 293.00 |
Washer Technology & Functional Applications
Engineered solutions for tension indication, load distribution, and severe vibration environments.
Standard Flat
Minimises scouring or scratch damage to mating material. Distributes the load of a threaded fastener over a larger area to prevent deformation of bearing surfaces.
Squirter (DTI)
Direct tension indicating washers feature protruding lugs. When tightened, these lugs deform and squeeze out highly visible silicone, giving immediate visual proof of tension.
Belleville (Conical)
A frusto-conical shaped spring. As tightening continues and the washer is flattened, it actually reduces the applied load to counteract the loosening of the joint.
Split-Lock Spring
Hardened spring steel split with out-of-plane deformations. When tightened, protruding corner edges bite into both compressing surfaces to resist vibration.