5/16″-18 x 3/4″ Red Thread Thumb Screw,Stainless Steel Standard/Coarse Thread…
Set Screw Thread Type: Unified National Coarse (UNC). Fastener Type: Thumb Screw. Thread Coverage: Fully Threaded. Drive System: Thumb. Thread Size: 5/16″-18. The thread thumb screw is made of corrosion resistant stainless steel material, the knob is made of aluminum.