5/16"-18 Hex Bolts Grade 5 Zinc Plated Steel 1/2in 5/8in 1in Up to 7in All Sizes

Hex cap screws are partially threaded and provide much tighter tolerance than their fully threaded counterparts. Hex bolts are the most common construction fastener having a hex head that can be secured with a socket or wrench and mated with a nut or another internally threaded item.