U-Drive Hammer Screws

U-Drive Screws are unslotted self-tapping screws often used for attaching nameplates in castings and for sealing drain holes in corrosion proofing tubular structures. They possess multiple start threads with large helical angles and an unthreaded pilot point. Similar to nails, they are driven into mating parts with a mallet or hammer for a quick and permanent assembly. No tapped threads are required in the mating part. However, the U-Drive Screw must be of harder material than the mating part and a undersized pre-drilled pilot hole is required. U-Drive Screws are also known as Hammer Drive Screws.