AN UNBIASED VIEW OF TYPES OF SCREW HEADS

it is a variation on the counter sunk screw head, nevertheless the below surface area of the head is curved, like a bugle. This cuts down harm to plasterboard lowering tearing in the paper, so is usually found on drywall screws These screws are commonly often called Robertson’s. they've got sq. center issue which prevent them from stripping out.

The Torx screw heads can certainly be mistaken for The inner hexagonal shape However they're much more like 6-pointed stars with curved regions in between the factors. This seriously maximizes the surface area area the bit will press from, causing Torx screw heads to become Among the many strongest. it really is a combination of a screw and washer