As a fastener product, drilling screw has a wide range of applications in production and life. What are the specific requirements of its mechanical properties?
1. Heart hardness: Standard: HRC32-40 The actual measurement of the company's products is HRC31.7-39.0.
2. Surface hardness: Standard: HV600-700 The actual measurement of the company's products is about HV620.
3. Hard layer: 4#-6#: 0.05-0.18mm
8#-12#: 0.10-0.23mm
14#: 0.15-0.28mm
4. Torque:
Specification | Drill screw | |||
TYPE BSD | TYPE CSD | |||
INCH-LB | KG-CM | INCH-LB | KG-CM | |
4# (2.9) | 14 | 16 | 14 | 16 |
6# (3.5) | 24 | 28 | 24 | 28 |
8# (4.2) | 42 | 48 | 48 | 55 |
10# (4.8) | 61 | 70 | 65 | 75 |
12# (5.5) | 92 | 106 | 100 | 115 |
14# (6.3) | 150 | 173 | 156 | 180 |
