Zinc plated steel, 18, US, 3/8"

US Fasteners, Zinc plated steel, 18, 3/8"
Sheet metal screws Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass or wood.	Sex bolts & Mating screws Sex bolts resemble machine screws, but with internal threads, and can be used with either specialized mating screws or standard machine screws. Also known as barrel nuts and Chicago bolts.