Hex cap screws are bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. These screws feature a coarse 5/16-18 USS thread size.

HILLMAN™ Hex Cap Screw, 5/16-18 Thread, Partial, USS Coarse Thread, 3/4 in Overall Length, Hex Head, 5 Grade, Steel, Finish: Zinc-Plated

• Appropriate for most general use (match with grade 5 washers and nuts)
• Allows for a stronger grip between objects and less shear movement
• Heat-treated zinc combines lasting durability with strong corrosion protection
• Hex cap head and machine threads combine to offer higher torque capability
• For installation, drill a hole in the material that matches the diameter of the bolt