Standard: ASME B 18.27
Available sizes: 1/8 to 9/64 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/8 | NA9-14 | 0.059 | 0.270 | 0.015 | 0.017 | 0.102 | 0.103 | 0.038 | 0.028 | 0.099 | 0.013 |
| 11/64 | NA9-S31 | 0.259 | 0.500 | 0.025 | 0.027 | 0.243 | 0.245 | 0.065 |
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.
| 0.050 |
| 0.239 |
| 0.023 |
| 5/32 | NA9-25 | 0.345 | 0.527 | 0.025 | 0.027 | 0.207 | 0.208 | 0.065 | 0.050 | 0.204 | 0.023 |
| 7/64 | NA9-12 | 0.027 | 0.230 | 0.010 | 0.011 | 0.094 | 0.095 | 0.035 | 0.025 | 0.091 | 0.009 |
| 9/64 | NA9-S18 | 0.122 | 0.375 | 0.015 | 0.017 | 0.122 | 0.123 | 0.048 | 0.038 | 0.119 | 0.013 |
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