Standard: BS 1981 - 1991
Available sizes: (1#) to 4# (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| (1#) | 0.199 | 0.035 | 0.027 | 0.171 | 0.042 | 0.012 | 0.033 | 0.019 |
| (3#) | 0.332 | 0.054 | 0.045 | 0.292 | 0.07 | 0.021 | 0.058 | 0.032 |
| 0# | 0.146 | 0.026 | 0.019 |
| 0.123 |
| 0.031 |
| 0.009 |
| 0.023 |
| 0.014 |
| 2# | 0.252 | 0.043 | 0.035 | 0.22 | 0.053 | 0.016 | 0.043 | 0.024 |
| 4# | 0.385 | 0.06 | 0.05 | 0.34 | 0.081 | 0.024 | 0.068 | 0.037 |
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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