Standard: TB /T 846 - 1991
Available sizes: R 1/2 to R 3/8 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| R 1/2 | 22 | 6 | 1.5 | 19 | 20.3 | 25 | 0.2 |
| R 1/4 | 15 | 4 | 1.5 | 8 | 8.9 | 11 | 0.02 |
| R 1/8 | 12 | 4 | 1 | 6 | 6.75 | 8 | 0.006 |
| R 3/4 |
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.
| 28 |
| 8 |
| 1.5 |
| 32 |
| 33.6 |
| 48 |
| 0.72 |
| R 3/8 | 18 | 5 | 1.5 | 14 | 15.1 | 18 | 0.07 |
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