Material	Carbon Steel
Brand	FIXDEX&GOODFIX
Drive System	Phillips
Head Style	Flat
Exterior Finish	Black Phosphate, Zinc

black drywall screw can be directly screwed into wood components (or parts) to fasten a metal (or non-metal) part with a through hole to a wood component. china fasteners flat head slotted countersunk screw is very suitable for many applications in the home, farm, business, automotive and industrial fields. Fasteners are coated with shallow zinc on the steel, which has a good anti-corrosion effect.
 
Note: The wood screws black iron m4 screw must be screwed in with a screwdriver. Never knock them in with a hammer, as it will damage the surrounding wood!