Special Features:

This item has a cup-type point; depression in the end of the screw reduces the area in contact with the surface, increasing holding power under pressure; edge digs in for locking power

Properties:

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.