Standard: BS 275
Available sizes: 1/2 to 9/16 (6 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| 1/2 | 14.29 | 10.001 | 29/32 | 22.860 | 25/64 |
| 11/16 | 23.81 | 16.669 | 1 1/2 | 38.100 | 21/32 |
| 13/16 | 28.58 | 20.003 | 1 51/64 | 45.720 | 25/32 |
| 3/4 | 26.99 | 18.891 | 1 45/64 | 43.180 | 3/4 |
| 5/8 |
| 20.64 |
| 14.446 |
| 1 19/64 |
| 33.020 |
| 9/16 |
| 9/16 | 17.46 | 12.224 | 1 3/32 | 27.940 | 31/64 |
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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