Standard: GB /T 6172 - 1986
Available sizes: M1.6 to M6 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 24035 |
| GB | GB /T 6172.1 |
| IS | IS 1364(-4) |
| NF | NF E 25-405-1 |
| DIN | DIN EN ISO 4035 |
| ISO | ISO 4035 |
| UNI | UNI 5589 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal |
|---|
| ds_nominal |
|---|
| M1.6 | 2.3 | 1.2 | 0.95 | 2 | 3.1 | 4 | 3.82 | 4.32 | 0.8 |
| M2 | 3.45 | 1.8 | 1.55 | 3 | 4.6 | 5.5 | 5.32 | 6.01 | 1.24 |
| M2.5 | 5.75 | 2.7 | 2.45 | 5 | 6.9 | 8 | 7.78 | 8.79 | 1.96 |
| M3 | 8.75 | 4 | 3.7 | 8 | 11.6 | 13 | 12.73 | 14.28 | 2.96 |
| M4 | 13 | 6 | 5.7 | 12 | 16.6 | 18 | 17.73 | 20.03 | 4.56 |
| M5 | 17.3 | 8 | 7.42 | 16 | 22.5 | 24 | 23.67 | 26.75 | 5.94 |
| M6 | 21.6 | 10 | 9.1 | 20 | 27.7 | 30 | 29.16 | 32.95 | 7.28 |
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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