Diameter: 7/16"
Length: 2"
Material: Steel
Finish: Chrome
Head Style: Hex (5/8" Wrench)
Thread Size: 20 (Fine)
Thread Length: 1" to 2"
Hardness: Grade 5
Type: Cap Screw

Box of 5.

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