3/8"-16 x 4" Zinc Plated Grade 2 / A307 Steel Coarse Thread Hex Bolts

Diameter: 3/8"
Length: 4"
Material: Steel
Finish: Zinc
Head Style: Hex (9/16" Wrench)
Thread Size: 16 (Coarse)
Thread Length: 1"
Hardness: Grade 2 / A307
Type: Cap Screw

Box of 10.

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