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

US Fasteners, Steel, 4-1/2", 18
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 screws Screws with machine threads for use with a nut or in a tapped hole.
Carriage bolts & Plow bolts Bolts with no drive and machine threads for use with a nut.	Hanger bolts & Dowel screws Hanger bolts and dowel screws are used for adding an external machine or screw thread to wood applications.
Eye bolts & Screw eyes Bolts or screws with a circular ring on the head.