Metallics JRM23 Screws 8-32 X 4 Rh Cd MS St-zn (Jar 100)
https://nsiindustries.com/product/8-32-x-4-in-round-head-combo-machine-screws-steel-zinc-100qty/
These screws have finer threads than typical screws, requiring a pre-drilled hole and are perfect for joining metal parts in machinery and construction. With a combo drive, these fasteners can be used with slotted and Phillips screwdrivers and drill bits.