Hex head carbon steel self-drilling screws are used to fasten sheet metal to steel purlins and rails. Thread dia: #14 (6.3mm) Thread type: Coarse(???A???), fine(“AB???), machined(“C???) depending upon drill capacity Length: 1″ – 9″ (25mm – 225mm)
| Drill Point | Drill Thickness | Recommended drive speed |
|---|---|---|
| #2 | 1.5 – 3.5mm | 1800 – 2000 RPM |
| #3 | 2.0- 5.0mm | 1800 – 2000 RPM |
| #5 | 6.0 – 12.5mm | 1800 – 2000 RPM |
Washer : Carbon steel 16mm and 19mm bonded to EPDM seal
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