5/16"-18 x 1-1/2" Zinc Plated Steel Coarse Thread Spade Head Thumb ScrewsType: Thumb Screws
Head Style: Spade
Thread Size: 18 (Coarse)
Type: Thumb Screw
Box of 12.
A thumb screw is a threaded fastener designed to be twisted into a tapped hole by hand without the use of tools.