Drywall screw fastener product is the whole series in one of the most important categories. The product is mainly used for a variety of gypsum board, ceiling series lightweight partition and ceiling installation.
Phosphated drywall screw is the most basic product lines, while blue zinc drywall screws are a complement to both the scope and the purchase price is basically the same. Slight difference is that black phosphate has a certain lubricity, IAS (scored specified thickness steel plate speed is a quality assessment indicators) was slightly better; while blue zinc in slightly better on rust and product of the light color, not easy in the paint pan after decorative color.
Phosphated drywall screw is the most basic product lines, while blue zinc drywall screws are a complement to both the scope and the purchase price is basically the same. Slight difference is that black phosphate has a certain lubricity, IAS (scored specified thickness steel plate speed is a quality assessment indicators) was slightly better; while blue zinc in slightly better on rust and product of the light color, not easy in the paint pan after decorative color.
