Type U Drive Screws (also known as u-drive screws or hammer drive screws) are unslotted round head self-tapping screws used for making permanent fastenings in metal and plastics, such as securing nameplates in castings.

They require a predrilled hole and can be installed with a hammer or mallet.

The U-drive screw is designed with multiple start threads, a large helix angle and pivot.

Steel drive screws produce mating threads without shearing of threads or fracture of the screw when driven into the proper sized hole in materials having a Rockwell hardness of B70 to B85.

Stainless steel drive screws are not recommended for use in materials with a hardness greater than Rockwell B65.