3/8"-16 x 1" (5 pcs.)

Diameter: 3/8"
Length: 1"
Material: Steel
Finish: Zinc
Driver Type: 9/16" Wrench
Thread Size: 16 (Coarse)
Thread Length: Full
Hardness: Grade 5
Type: Cap Screw

Box of 5.

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