1/4", Hex washer

US Fasteners

Hex washer head self drilling

Sheet metal screws

Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.
Machine screws hex washer head

Machine screws

Screws with machine threads for use with a nut or in a tapped hole.
Roofing screws

Roofing screws

Screws designed to be used in metal roofing applications and are available in a variety of colors.
Anchors

Anchoring products

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