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

Screws > Roofing Self-Drilling Screws
- Hex Waser Head Roofing Screws, Self-drilling/Reduce Point screw, with Bonded Washer C1022 + Harden + ZP or ZP + Painting Head (by liguid Painting)
- Finish: ZP

| Item | Spec. | U.Weight /Mpcs |
Washer Dia.(mm) |
Item | Spec. | U.Weight /Mpcs |
Washer Dia.(mm) |
| 1 | 4.8 x 25 | 3.44 | 14 | 8 | 5.5 x 50 | 8.77 | 16 |
| 2 | 4.8 x 28 | 3.70 | 14 | 9 | 5.5 x 65 | 10.57 | 16 |
| 3 | 4.8 x 35 | 4.30 | 14 | 10 | 6.3 x 25 | 6.70 | 19 |
| 4 | 4.8 x 65 | 7.20 | 14 | 11 | 6.3 x 28 | 7.18 | 19 |
| 5 | 5.5 x 25 | 4.45 | 16 | 12 | 6.3 x 35 | 8.55 | 19 |
| 6 | 5.5 x 28 | 4.80 | 16 | 13 | 6.3 x 50 | 11.00 | 19 |
| 7 | 5.5 x 35 | 5.64 | 16 | 14 | 6.3 x 35 | 13.50 | 19 |
- Hex Waser Head Roofing Screws, Tapping Screw, with Bonded Washer C1022 + Harden + ZP or ZP + Painting Head (by liguid Painting)
- Finish: ZP

| Item | Spec. | U.weight /Mpcs |
Item | Spec. | U.weight /Mpcs |
Item | Spec. | U.weight /Mpcs |
| 1 | 4.8 x 25 | 3.44 | 4 | 4.8 x 65 | 7.20 | 7 | 5.5 x 35 | 5.64 |
| 2 | 4.8 x 28 | 3.70 | 5 | 5.5 x 25 | 4.45 | 8 | 5.5 x 50 | 8.77 |
| 3 | 4.8 x 35 | 4.30 | 6 | 5.5 x 28 | 4.80 |