Hex Washer Head with Bonded Sealing Washer (SAE, ASTM, ANSI)
Head Type：Hex Washer Head
Thread Type：Coarse Thread
Material Options：Carbon steel /Stainless steel（304/316）
Finish / Coating：Magni coating
- Typically gray or silver-gray in color
- Multi-layer coating system: zinc-plated base layer with organic top coating
- Tested in accordance with ASTM B117 salt spray requirements
- Compatible with EPDM sealing washers, with no risk of chemical corrosion
Applications：
- Metal Roofing to Steel Purlins
- Roofing Sheets with Waterproof Requirement
- Agricultural & Industrial Buildings
- Light Steel Framing & Cladding Systems
This self-drilling roofing screw is designed for fast, secure, and watertight fixing of metal roofing sheets to steel substructures.
| Size | Dia (mm) | Drill Tail |
|---|---|---|
| SDM 12–14 × 1″ | 5.5 | #3 |
| SDM 12–14 × 1-1/2″ | 5.5 | #3 |
| SDM 12–14 × 2″ | 5.5 | #3 |
| SDM 12–14 × 3″ | 5.5 | #3 |
| SDM 12–14 × 4″ | 5.5 | #3 |
| SDM 14–10 × 1″ | 6.2 | #3 |
| SDM 14–10 × 1-1/2″ | 6.2 | #3 |
| SDM 14–10 × 2″ | 6.2 | #3 |
| SDM 14–10 × 3″ | 6.2 | #3 |
| SDM 14–10 × 4″ | 6.2 | #3 |
| SDM 14–10 × 5″ | 6.2 | #3 |