Standard: GB 70 - 1985
Available sizes: M1.6 to M3 (4 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 | 1.56 | 1.545 | 1.86 | 2.00 | 3.98 | 3.62 | 1.5 | 1.520 | 2.00 | 1.86 |
| M2 | 0.5 | 2.58 | 2.56 | 2.86 | 3.00 | 5.68 | 5.32 | 2.5 |
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.
| 2.52 |
| 3.00 |
| 2.86 |
| M2.5 | 0.8 | 4.095 | 4.095 | 4.82 | 5.00 | 8.72 | 8.28 | 4 | 4.020 | 5.00 | 4.82 |
| M3 | 1.25 | 6.14 | 6.095 | 7.78 | 8.00 | 13.27 | 12.73 | 6 | 6.020 | 8.00 | 7.64 |
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