Diameter: 5/16"
Length: 4"
Material: Steel
Finish: Green Rinsed Zinc
Head Style: Hex (1/2" Wrench)
Thread Size: 18 (Coarse)
Thread Length: 7/8"
Hardness: Grade 5
Type: Cap Screw

Box of 105.

A hex cap screw has a hexagonal head, designed to be driven by a wrench.