Countersunk (Flat) Head Self-Drilling Screw
Head Type：Countersunk Head
Thread Type：Coarse Thread
Material Options：Carbon steel /Stainless steel（304/316）
Finish / Coating：Class 3 /Dacromet/Ruspert / Zinc
Applications：
- Metal-to-metal fastening in light-gauge steel
- Fixing steel sheets, panels, and fittings requiring a flush finish
- Interior steel components and concealed connections
- Applications where a smooth surface finish is required
Designed for neat and efficient fastening, this countersunk self-drilling screw provides clean drilling and secure holding with a flush, professional finish.
| Size | Length (inch) | Length (mm) | Dia (mm) | Drill Tail |
|---|---|---|---|---|
| SDM 6–20 × 50 | 2″ | 50 | 3.5 | #2 |
| SDM 8–18 × 25 | 1″ | 25 | 4.2 | #2 |
| SDM 10–24 × 25 | 1″ | 25 | 4.8 | #3 |
| SDM 10–24 × 30 | 1-3/16″ | 30 | 4.8 | #3 |
| SDM 10–24 × 40 | 1-9/16″ | 40 | 4.8 | #3 |
| SDM 10–24 × 50 | 2″ | 50 | 4.8 | #3 |