Diameter: 5/8"
Length: 6-1/2"
Material: Steel
Finish: Hot Dip Galvanized
Head Style: Hex (15/16" Wrench)
Thread Size: 11 (Coarse)
Thread Length: 4 to 6"
Type: Cap Screw

Box of 15.

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