1/4" x 1-3/8"

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.
Socket product

Socket screws

Screws with an allen wrench drive.
Anchors

Anchoring products

Fasteners for anchoring in stone, concrete, brick, and drywall, etc.