We specialize in the research and development, production, and sales of various standard, non-standard, and fasteners such as high-quality and high-precision bolts, screws, nuts, washers, etc.
Fasteners have diverse materials and complete specifications, supporting non-standard customization.
Consulting service hotline:13306482520
Email:13306482520@163.com
| Thread specification | ST2.9 | ST3.5 | (ST3.9) | ST4.2 | ST4.8 | (ST5.5) | ST6.3 | |
| P | Pitch | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a | Maximum value | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| c | Minimum value | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| dc | Maximum value | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| Minimum value | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | |
| e | Minimum value | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | Maximum value | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| Minimum value | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | |
| kw | Minimum value | 1.3 | 1.5 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r | Maximum value | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |
| s | Maximum value | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 |
| Minimum value | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | |
| dp | 2.3 | 2.8 | 3.1 | 3.6 | 4.1 | 4.8 | 5.8 | |
| Drilling range (plate thickness) | 0.7~1.9 | 0.7~2.25 | 0.7~2.4 | 1.75~3 | 1.75~4.4 | 1.75~5.25 | 2~6 | |
| Lg (minimum value) | - | - | - | - | - | - | - | |
| ① Material: Made of surface hardened steel according to DIN 17210 or quenched and tempered steel according to DIN EN 10083-1 and DIN EN 10083-2 (at the discretion of the manufacturer), equivalent steel grades are allowed. | ||||||||
E-Mail：13306482520@163.com
Phone：133-0648-2520
Address：008, Zone 9, Wanxing International Hardware City, Heilongjiang North Road, Chengyang District, Qingdao City, Shandong Province
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