Standard: BS 4320
Available sizes: (M1.4) to M2.5 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| (M1.4) | 2.4 | 5.0 | 4.7 | 2.55 | 2.4 | 0.6 | 0.4 | 5.0 | 0.5 |
| (M2.2) | 5.3 | 10 | 9.7 | 5.5 | 5.3 | 1.1 | 0.9 | 10 | 1.0 |
| M1 |
| 1.3 |
| 3.0 |
| 2.8 |
| 1.45 |
| 1.3 |
| 0.4 |
| 0.2 |
| 3.0 |
| 0.3 |
| M1.2 | 1.7 | 4.0 | 3.7 | 1.85 | 1.7 | 0.4 | 0.2 | 4.0 | 0.3 |
| M1.6 | 3.2 | 7 | 6.7 | 3.4 | 3.2 | 0.6 | 0.4 | 7 | 0.5 |
| M2 | 4.3 | 9 | 8.7 | 4.5 | 4.3 | 0.9 | 0.7 | 9 | 0.8 |
| M2.5 | 7.4 | 14 | 13.6 | 7.7 | 7.4 | 1.8 | 1.4 | 14 | 1.6 |
Standard corrosion protection for indoor and mild outdoor environments.
Salt spray: 96–200 hours | RoHS compliant (trivalent chromium)
High-performance coating for automotive, marine, and harsh environments.
Salt spray: 720–1500 hours | Recommended for grade 8.8+
Heavy-duty protection for structural and outdoor applications.
Salt spray: 500–1000 hours | Thread tolerance adjustment required
Note for high-strength fasteners (Grade 10.9, 12.9): Electroplating processes require hydrogen embrittlement relief baking (minimum 4 hours at 200°C within 4 hours of plating). Contact our engineering team for grade-specific plating recommendations.
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
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