5/16" x 3-1/2", US, Hot dipped galvanized steel, Hex

US Fasteners, 5/16" x 3-1/2", Hot dipped galvanized steel, Hex
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.	Lag bolts Large wood screws technically called lag screws.