Standard: ANSI B 18.3
Available sizes: M3 to M8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.7 | 1.5 | 2.87 | 7.8 | 2.48 | 4 | 3.82 | 2.560 | 2.52 | 8.96 | 2.5 |
| M4 | 1 | 2.2 | 4.58 | 11.7 | 3.72 | 6 | 5.82 |
| 4.084 |
| 4.02 |
| 13.44 |
| 4 |
| M5 | 1.5 | 3.6 | 6.86 | 19.5 | 6.20 | 10 | 9.78 | 6.095 | 6.02 | 22.40 | 6 |
| M6 | 2 | 4.7 | 11.5 | 26.18 | 8.12 | 14 | 13.73 | 10.127 | 10.025 | 30.24 | 10 |
| M8 | 2.5 | 5.6 | 13.8 | 34.60 | 10.16 | 20 | 19.67 | 12.146 | 12.032 | 40.32 | 12 |
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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