18, 4-1/2", Zinc, US

US Fasteners

Hex bolt

Hex bolts

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
Machine screw

Machine screws

Screws with machine threads for use with a nut or in a tapped hole.
Carriage bolt

Carriage bolts & Plow bolts

Bolts with no drive and machine threads for use with a nut.
Eye bolts

Eye bolts & Screw eyes

Bolts or screws with a circular ring on the head.