Geno Industries 24465 100/BOX M4.2 X 19MM PHILLPS FLAT TOP WASHER HEAD TAPPING SCREW, box of 100

Tapping screws are generally used for retention of interior and exterior mouldings, trim, dash panels, etc. Can be used with nylon nuts, screw grommets or installed directly into sheet metal. They cut or form a thread when driven into a performed hole. There are many varieties available - Phillips flat top washer head, pan head, Phillips oval head, hex head, hex washer head, etc. you can have Phillips oval head screws with undersized heads such as a No.8 screw with a No.6 head. Such a screw is used where the original fasteners was a No.6 screw but now needs to be replaced with a No.8 screw yet the application still requires a No.6 head.