Hex Bolts Are Externally Threaded Fasteners Designed for Insertion Through Holes in Assembled Parts and Are Normally Intended to be Tightened or Released by Torquing a Nut; Screw has Three Hash Marks

Specifications:

Type: Fully Threaded, Cap Screw
Nominal Diameter: 1/4 Inch
TPI: 20
Length: 1/2 Inch
Head Height: 5/32 Inch
Head Width Across Flat: 7/16 Inch
Material: Grade 5 Steel
Process: Quenched and Tempered
Finish: Zinc Plated