Standard: GB /T 62.1 - 2004
Available sizes: M10 to M8 (8 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 62.1 |
| JIS | JIS B 1185 Type 1 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 43 | 13 | 11 | 109.5 | 56 | 36 | 112 | 54 | 22 | 114.5 | 58 |
| M2 | 5 | 3 | 2.5 | 14.5 | 8 | 4 | 16 | 6.5 |
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.
| 3 |
| 17.5 |
| 9.5 |
| M2.5 | 7 | 4 | 3 | 18.5 | 10 | 6 | 20 | 8.5 | 4 | 21.5 | 11.5 |
| M3 | 10.5 | 5 | 4 | 30 | 16 | 9 | 32 | 14.5 | 6 | 34 | 17.5 |
| M4 | 18 | 6.5 | 5.5 | 48 | 25 | 15 | 50 | 23.5 | 10 | 52 | 26.5 |
| M5 | 26 | 9 | 8 | 68 | 35 | 22 | 70 | 33 | 14 | 72 | 37 |
| M6 | 30 | 10 | 8 | 78 | 40 | 25 | 80 | 38 | 16 | 82 | 42 |
| M8 | 38 | 12 | 10 | 97.5 | 50 | 32 | 100 | 48 | 20 | 102.5 | 52 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.