Diameter: 9/16"
Length: 2"
Material: Steel
Finish: Green Rinsed Zinc
Head Style: Hex (7/8" Wrench)
Thread Size: 18 (Fine)
Thread Length: 2"
Hardness: Grade 5
Type: Cap Screw

Box of 29.

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