Standard: JB /T 2775 - 1992
Available sizes: M14 to M30 (6 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M14 | 2 | 16.35 | 15.65 | 24 | 23.72 | 0.04 | 16 | 27.7 |
| M16 | 3 | 24.42 | 23.58 | 36 | 35.66 | 0.137 | 24 | 41.6 |
| M20 | 3.5 | 30.5 | 29.5 | 46 | 45.66 | 0.286 | 30 | 53.1 |
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.
| M24 | 4 | 36.5 | 35.5 | 55 | 54.6 | 0.498 | 36 | 63.5 |
| M27 | 4.5 | 45.5 | 44.5 | 70 | 69.6 | 1.04 | 45 | 80.8 |
| M30 | 5 | 56.6 | 55.4 | 85 | 84.5 | 1.668 | 56 | 98 |
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