Standard: BS 2470 - 1973
Available sizes: 0# to 6# (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 0# | 0.139 | 0.050 | 0.028 | 0.129 | 0.039 | 0.033 | 1/2 |
| 1# | 0.188 | 1/16 | 0.035 | 0.176 | 0.052 | 0.044 | 1/2 |
| 2# | 0.238 | 5/64 | 0.044 | 0.226 | 0.066 | 0.058 | 1/2 |
| 3# | 0.312 | 3/32 | 0.052 | 0.298 | 0.087 | 0.077 | 3/4 |
| 4# | 0.437 | 5/32 | 0.087 | 0.419 | 0.132 | 0.122 | 1 |
| 5# | 0.656 | 7/32 | 0.122 | 0.636 | 0.199 | 0.185 | 1-1/4 |
| 6# | 1.000 | 3/8 | 0.210 | 0.970 | 0.331 | 0.311 | 2 |
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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