Alloy Steel Set Screws, Nylon Tip, 1/4-28 x 1/2" Thread Length, 10 Pieces
Nylon Tip Diameter .125"
Nylon Tip Height .063"
Thread Length  .500"
Overall Length  .563"
Nylon Tip is Non Conductive and has a temperature range is –50 to 250 F.
Hex socket

This Nylon Tipped Set Screw allows users to remove “slop” and fine tune the fit of their upper with their lower receiver. Achieve a tight fit with any standard AR-15 upper receiver by inserting the screw into the grip tang of any Lower Receiver that comes equipped with a vertical 1/4″ – 28 threaded hole and tightening against the upper receiver until there is no wobble between the 2 parts.
  • Designed to be used with lower receivers that are drilled and tapped with a 1/4"-28 threaded hole.
  • Works on AR15 and AR10 Style Rifles