Standard: BS 2470 - 1973
Available sizes: 0# to 4# (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 0# | 64 | 0.040 | 0.033 | 72 | 0.035 | 0.028 |
| 1# | 48 | 0.054 | 0.045 | 56 | 0.050 | 0.040 |
| 2# | 40 | 0.067 | 0.057 | 44 | 1/16 | 0.050 |
| 3# | 32 | 0.087 | 0.076 |
| 36 |
| 5/64 |
| 0.062 |
| 4# | 24 | 0.102 | 0.088 | 32 | 3/32 | 0.075 |
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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