ISO-15480 DIN7504K Hexagon Washer Head Self-drilling Screws
Self-drilling screws are common construction screws used to fasten metal structures in a quick and convenient way. Choosing the right screws with compliance will reduce a lot of working time and secure your building. Sun Through offers nice self-drilling screws with good quality at a competitive price. It is also known as Tek screws.ISO 15480 adopted DIN-7504K and defines the dimensions, tolerance, mechanical properties and conditions for acceptance clearly. Sun Through's self-drilling screws are in compliance with the standards.
Head Dimension Reference
| Thread Sizes | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
| Washer Thickness | >0.9 | >0.9 | >1.0 | >1.0 |
| Washer Dia. | 8.2-8.8 | 9.8-10.5 | 10.0-11.0 | 12.2-13.2 |
| Hexagon Cross Points | >7.59 | >8.71 | >8.71 | >10.95 |
| Head Hight (includ. wahser) | 4.00-4.25 | 4.15-4.45 | 5.15-5.45 | 6.15-6.45 |
| Wrench size to use | 7mm | 8mm | 8mm | 10mm |
Thread and length size reference.
| ST4.2 | ST4.8 | ST5.5 | ST6.3 | |||
|
Drilling capacity |
1.75-3.00 | 1.75-4.4 | 1.75-5.25 | 2.0-6.0 | ||
| Nominal length | min. | max. | Thread Length (min.) | |||
| 13 | 12.1 | 13.9 | 4.3 | 4.7 | ||
| 16 | 15.1 | 16.9 | 7.3 | 5.8 | 5.0 | |
| 19 | 18 | 20 | 10.3 | 8.7 | 8.0 | 7.0 |
| 22 | 21 | 23 | 13.3 | 11.7 | 11 | 10 |
| 25 | 24 | 26 | 16.3 | 14.7 | 14 | 13 |
| 32 | 30.75 | 33.25 | 23.0 | 21.5 | 21 | 20 |
| 38 | 36.75 | 39.25 | 29.0 | 27.5 | 27 | 26 |
| 45 | 43.75 | 46.25 | 34.5 | 34 | 33 | |
| 50 | 48.75 | 51.25 | 39.5 | 39 | 38 | |
*** specifications can be customized, contact us for specific specs***