Diameter: 1/2"
Length: 9"
Material: Steel
Finish: Zinc
Head Style: Hex (3/4" Wrench)
Thread Size: 13 (Coarse)
Thread Length: 1-1/2"
Hardness: Grade 2 / A307
Type: Cap Screw

Box of 20.

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