DIN 7504 K
DIN 7504 K , Hex Washer Head Self Drilling Screws , Normally will used with a EPDM Washer, it called as Roofing screws also.
Dimension of DIN 7504 K as below:
 |
| d | 3.5 | 3.9 | 4.2 | 4.8 | 5.5 | 6.3 |
| s | 5.5 | 5.5 | 7 | 8 | 8 | 10 |
| dc max. | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.2 |
| k min | 3.2 | 3.2 | 4 | 4.15 | 5.15 | 6.15 |
| k max. | 3.45 | 3.45 | 4.25 | 4.45 | 5.45 | 6.45 |
| dk max. | 2.8 | 3.1 | 3.6 | 4.1 | 4.8 | 5.8 |
1. All size in mm ;