14, 2-1/2"

US Fasteners

Sheet metal screw

Sheet metal screws

Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.
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.
Flange bolts

Flange bolts

Flange bolts have a flange on the bottom of the head that distributes the load like a washer.
Carriage bolt

Carriage bolts & Plow bolts

Bolts with no drive, and machine threads for use with a nut.
Socket product

Socket screws

Screws with an Allen wrench drive.
Nut

Nuts

Nuts have internal machine threads, for use with machine thread bolts and screws.
Eye bolts

Eye bolts & Screw eyes

Bolts or screws with a circular ring on the head.