Ningbo Haitian Fastener Industry Co., LTD.
A professional manufacturer for screws, bolts and nuts.

Screws > Modify Truss head self-drilling screws
- Wafer/Phil.Head Self-drilling Screw, Twinfast Thread, C1022 + Harden
- Finish: ZP, ZY

| Item | 1 | 2 | 3 | 4 | 5 |
| Spec. | 4.2 x 13 | 4.2 x 16 | 4.2 x 19 | 4.2 x 25 | 4.2 x 32 |
| U.weight/Mpcs | 1.8 | 2 | 2.2 | 2.63 | 3.08 |