Standard: ANSI B 18.3
Available sizes: M1.6 to M4 (5 sizes)
| Standard Body | Standard Number |
|---|---|
| AS | AS 1420 |
| GB | GB /T 70.1 |
| NF | NF E 25-125 |
| DIN | DIN EN ISO 4762 |
| ISO | ISO 4762 |
| UNI | UNI 5931 |
| ANSI | ANSI/ASME B 18.3.1M |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max |
|---|
| ds_min |
|---|
| k_nominal |
|---|
| ds_nominal |
|---|
| M1.6 | 0.4 | 0.68 | 1 | 3.65 | 2 | 2 | 1.86 | 0.2 | 1.5 | 3.8 | 1.91 |
| M2 | 0.5 | 1.02 | 1.5 | 5.32 | 3 | 3 | 2.86 | 0.3 | 2.5 | 5.5 | 2.89 |
| M2.5 | 0.8 | 1.9 | 2.5 | 8.27 | 5 | 5 | 4.82 | 0.5 | 4 | 8.5 | 4.86 |
| M3 | 1.25 | 3.2 | 4 | 12.7 | 8 | 8 | 7.78 | 0.8 | 6 | 13 | 7.83 |
| M4 | 1.5 | 4 | 5 | 15.67 | 10 | 10 | 9.78 | 1 | 8 | 16 | 9.81 |
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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