Knurled Head Thumb Screw

The 5/16″-18 x 1/2" thumb screw is used on our extended roll-on wheel chocks and some of our custom brackets. These thumb screws have a knurled head for a slip-resistant controlled adjustment. They have a lightweight and nonconductive plastic head and chemical-resistant 18-8 stainless steel threads.This knob eliminates the rattle when the wheel chock is unloaded and eliminate any wobble. FEATURES Knurled head Slip-resistant Chemical resistant 18-8 steel threads Made In The U.S.A. SPECS 3/8″-16 x 1/2" Thread INCLUDES (1) 3/8-16″ x 1/2" Thumb screw