Standard: ANSI B 18.29
Available sizes: 2# to 8# (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2# | 56 | 3-3/8 | 0.012 | 0.146 | 0.072 | 0.131 | 0.146 | 0.083 | 0.031 | 0.124 | 0.090 |
| 3# | 40 | 3-1/2 | 0.018 | 0.193 | 0.100 | 0.173 | 0.193 |
| 0.057 |
| 0.033 |
| 0.173 |
| 0.130 |
| 4# | 32 | 4-1/8 | 0.025 | 0.256 | 0.130 | 0.236 | 0.256 | 0.084 | 0.058 | 0.236 | 0.182 |
| 6# | 24 | 5-1/2 | 0.036 | 0.400 | 0.203 | 0.380 | 0.400 | 0.138 | 0.094 | 0.359 | 0.291 |
| 8# | 20 | 6-5/8 | 0.042 | 0.549 | 0.281 | 0.524 | 0.549 | 0.198 | 0.141 | 0.494 | 0.416 |
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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