Series 500 Hex Self Drilling Screws
Head Type：Hex Flange Head
Thread Type：Coarse Thread
Material Options：Carbon steel /Stainless steel（304/316）
Finish / Coating：C8 Coating /Class 4/Dacromet/Ruspert/Zinc
Applications：
- Steel-to-steel fastening in light to medium gauge steel
- Fixing purlins, girts, and steel framing to structural steel
- Connections requiring long drill capability and high clamp load
- Structural fixing points in industrial and commercial buildings
Designed for demanding steel applications, this HFL self-drilling screw provides extended drilling capacity, strong pull-down performance, and reliable long-term fastening.
| Size | Length (inch) | Length (mm) | Dia (mm) | Drill Tail |
| S500 12–24 × 32 | 1-1/4″ | 32 | 5.8 | #5 |
| S500 12–24 × 38 | 1-1/2″ | 38 | 5.8 | #5 |
| S500 12–24 × 50 | 2″ | 50 | 5.8 | #5 |
| S500 12–24 × 65 | 2-1/2″ | 65 | 5.8 | #5 |