Standard: ASME B 18.2
Available sizes: 1/2 to 7/16 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 1.1250 | 1.079 | 1-1/8 | 1-13/16 | 1.756 | 7 | 12 | 2.381 | 2.563 | 8 | 1.812 |
| 1/4 | 0.3125 | 0.280 | 5/16 | 9/16 | 0.546 | 18 | 24 |
| 0.720 |
| 0.795 |
| — |
| 0.562 |
| 3/4 | 1.5000 | 1.433 | 1-1/2 | 2-3/8 | 2.300 | 6 | 12 | 3.128 | 3.359 | 8 | 2.375 |
| 3/8 | 0.6250 | 0.587 | 5/8 | 1-1/16 | 1.031 | 11 | 18 | 1.386 | 1.503 | — | 1.062 |
| 5/16 | 0.4375 | 0.403 | 7/16 | 3/4 | 0.728 | 14 | 20 | 0.970 | 1.060 | — | 0.750 |
| 5/8 | 1.3750 | 1.310 | 1-3/8 | 2-3/16 | 2.119 | 6 | 12 | 2.879 | 3.094 | 8 | 2.188 |
| 7/16 | 0.8750 | 0.833 | 7/8 | 1-7/16 | 1.394 | 9 | 14 | 1.884 | 2.033 | — | 1.438 |
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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