Diameter: 3/8"
Length: 1-3/4"
Material: Steel
Finish: Chrome
Head Style: Hex (9/16" Wrench)
Thread Size: 16 (Coarse)
Thread Length: Full
Hardness: Grade 5
Type: Cap Screw

Box of 10.

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