TYPES OF SCREW HEADS FOR DUMMIES

Flat screw heads entirely sit With all the surface which depart no part of head exposed thus these screws must be countersink. A pentagon screw push uses 5-sided fastener heads, and also the fastener is named a penta screw or penta bolt. it's designed to be intrinsically incompatible with several instruments. because 5 is undoubtedly an odd number