1/4"-20 x 2-1/2" Zinc Plated Grade 5 Steel Coarse Thread Hex Cap Screws CSHS5-074

Diameter: 1/4"
Length: 2-1/2"
Material: Steel
Finish: Zinc
Head Style: Hex (7/16" Wrench)
Thread Size: 20 (Coarse)
Thread Length: 3/4"
Hardness: Grade 5
Type: Cap Screw

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