Diameter: 1/2"
Length: 5-1/2"
Material: Steel
Finish: Hot Dip Galvanized
Head Style: Hex (3/4" Wrench)
Thread Size: 13 (Coarse)
Thread Length: 4 to 6"
Type: Cap Screw

Box of 25.

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