Bugle-head drywall screws for fixing gypsum board to steel studs (fine thread, sharp or drill point) and to timber studs (coarse thread). 3.5 to 4.8 mm, lengths 19–152 mm, black phosphate, grey phosphate or zinc finish.
| Product / standard | Sizes | Grades | Material | Finishes | MOQ |
|---|---|---|---|---|---|
| ASTM C1002 / C954 (type) Drywall Screw | 3.5 – 4.8 mm (#6 – #10) | Case hardened | Carbon steel C1022 | Black oxide / phosphate, Zinc plated | 500 pcs / size |
Zinc-nickel and zinc are plated on our own line in Ningbo. Other finishes are applied by specialist coaters to the relevant standard.
| Finish | Applied | Notes |
|---|---|---|
| Black oxide / phosphate | Available | Indoor or oiled service |
| Zinc plated | Our own line | Clear/blue, yellow or black passivation |
For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.

Send sizes and quantities — we reply with price, finish options and lead time within 24 hours.