Calculate the exact weight of your roofing fasteners instantly. Our Hex Washer Head Self Drilling Screw Calculator is designed for hex-drive screws with a built-in washer and drill point (DIN 7504 K / ISO 15480).
Whether for metal roofing or thick steel cladding, precision matters. These hex Tek screws deliver maximum torque and drill, tap, and secure in one step—completely eliminating pilot holes. Get accurate weight data in seconds.
Supported Size Range:
- ✔ Diameters: ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, up to ST6.3.
- ✔ Lengths: Ranging from 9.5mm up to 150mm.
- ✔ Key Feature: Hex Washer & Drill Point (Provides high torque and one-step installation without pre-drilling).
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Hex Washer Head Self Drilling Screw Weight Chart (Stainless Steel 304, g/pc)
| Spec \ Length(mm) | 10 | 16 | 25 | 30 | 40 | 50 | 70 | 100 | 150 |
|---|---|---|---|---|---|---|---|---|---|
| ST2.9 | 0.48 | 0.67 | 0.96 | 1.1 | — | — | — | — | — |
| ST3.5 | 1.0 | 1.3 | 1.7 | 1.9 | 2.4 | 2.9 | — | — | — |
| ST3.9 | — | 1.4 | 1.9 | 2.2 | 2.9 | 3.5 | — | — | — |
| ST4.2 | — | 2.0 | 2.5 | 2.9 | 3.5 | 4.1 | 5.4 | — | — |
| ST4.8 | — | 2.6 | 3.4 | 3.8 | 4.7 | 5.6 | 7.3 | 9.9 | — |
| ST5.5 | — | 3.1 | 4.2 | 4.7 | 5.9 | 7.1 | 9.4 | 12.9 | 18.7 |
| ST6.3 | — | 5.0 | 6.4 | 7.1 | 8.5 | 10.0 | 12.9 | 17.2 | 24.5 |
Note: Weights shown are for Stainless Steel 304. For other materials, multiply by the density ratio. "—" indicates length not available for this specification.
