1/4"-20 x 1/2" Thumb Screws / Type A with Shoulder / Steel / Zinc (Quantity: 100 pcs)

A cold headed, one piece screw with rolled threads and a flattened head designed for manual turning without a driver or wrench. The shoulder flares to a circular shape of a diameter slightly less than the head diameter of the screw. A shoulder pattern allows the head of the screw to seat flush against the mating surface and helps avoid over tightening of the fastener which could result in stripped mating threads