Standard: TB /T 1266 - 1993
Available sizes: (M18) to M30 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M18) | 2 | 13.8 | 21 | 4 | 16 | 30 | 14 | 9.1 | 12 | 12 | 10 |
| (M27) | 2 | 21.9 | 28 | 4 | 22 | 58 | 22.5 | 13.9 |
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.
| 17 |
| 19 |
| 15 |
| (M33) | 2 | 27.7 | 33 | 4 | 26 | 75 | 28 | 15.9 | 19 | 24 | 17 |
| M16 | 1.5 | 9.2 | 16 | 3 | 12 | 25 | 9.5 | 4.25 | 6 | 8 | 5 |
| M20 | 2 | 16.2 | 23 | 4 | 18 | 38 | 17 | 11.9 | 15 | 14 | 13 |
| M24 | 2 | 19.6 | 26 | 4 | 20 | 48 | 20 | 12.9 | 16 | 17 | 14 |
| M30 | 2 | 27.7 | 33 | 4 | 26 | 68 | 28 | 15.9 | 19 | 24 | 17 |
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