Catalogue of produce
Screws with Round Head (В, 4.8) GOST 17437-80
| Size Range | М3-М12 |
| Grade of Accuracy | В |
| Thread Tolerance Range | 6g |
| Grade of Strength | 3.6 4.6 5.8 |
| Steel Grade | 10кп 20кп |
| d | 3 | 4 | 5 | 6 | 8 | 10 |
| D | 5,5 | 7 | 8,5 | 10 | 13 | 16 |
| b | 12 | 14 | 16 | 18 | 22 | 26 |
| R | 2,9 | 3,6 | 4,4 | 5,1 | 6,6 | 8,1 |
| k | 2,1 | 2,8 | 3,5 | 4,2 | 5,6 | 7 |
| L | 6..30 | 6..40 | 10..50 | 10..50 | 16..60 | 20..70 |