#10 x 2-1/4", US

US Fasteners, #10 x 2-1/4"
Wood screws Screws with a smooth shank and tapered point for use in wood.	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.	Socket screws Screws with an Allen wrench drive.
Eye bolts & Screw eyes Bolts or screws with a circular ring on the head.