fix the gypsum board with steel frame channel also the steel channel fixing.                 

 

Our high quality screw usually used to fix the gypsum board with steel frame channel also the steel channel fixing.
The popular size:
Black phosphor:
3.5x25mm, 3.5x35mm, 3.5x45mm, 3.5x11mm, 3.5x50mm, 3.5x55mm, 3.8x64mm, its with anti oxidized materials.
Model: Fine thread/dense carving and Coarse thread/sparse carving.
Zinc plated:
4.2x13mm, 4.2x14mm, 4.2x16mm, 4.2x25mm, 4.2x32mm, 4.2x76mm.
Model: Cusp end and drill end.