Diameter: 1/4"
Length: 5"
Material: Steel
Finish: Zinc
Head Style: Hex (7/16" Wrench)
Thread Size: 20 (Coarse)
Thread Length: 3/4"
Hardness: Grade 2 / A307
Type: Cap Screw

Box of 139.

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