(113) A thread tapping screw with spaced threads and a drill point which drills its own hole.
Used to attach plywood, soft woods, or composition board to metal, or to attach metal to metal. Offers economical benefits by reducing labor and tooling costs and eliminating drill bits and taps.
(39) A one-piece screw with rolled threads and a flattened head designed for manual turning without a driver or wrench.
Used in applications where the fastener is frequently adjusted and where tightening torque greater than that achieved with finger pressure is not required.
(5) A screw having a wing-shaped head designed for manual turning without a driver or wrench.
Used in applications where the fastener is frequently adjusted and where tightening torque greater than that achieved with finger pressure is not required. Used instead of a thumb screw when greater torque is needed.