1", Phillips flat head, 316

US Fasteners

Phillips flat head

Wood screws

Screws with a smooth shank and tapered point for use in wood.
Phillips flat head

Sheet metal screws

Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass or wood.
Phillips flat head

Machine screws

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