Metallics JTRM84 8-32 x 1/2 in. Round Head Tri-Drive Machine Screws - Steel Zinc - Each

The JTRM84 round head takes three drivers: a flat blade for the slot, a Phillips, or a square (Robertson) bit. Whichever is already in your pouch works, which is the point of a tri-drive head on service calls where you are not standing next to the truck.

8-32 is the standard thread for receptacle, switch, and cover plate mounting in outlet boxes, and these Metallics screws are cut to that thread at a 1/2 inch length, which is the common replacement length for device yokes into box ears. For deeper stack-ups, such as mounting through a thick plaster ring or added spacers, you need a longer 8-32 screw than 1/2 inch.

These are machine screws, meaning a straight 8-32 machine thread that threads into an existing tapped hole or a nut. They will not cut their own thread into raw sheet metal, so for unthreaded enclosure skins or strut you want a self-drilling or sheet metal screw instead.

They are steel with a zinc plating, which handles normal indoor and dry-location service and resists surface rust from humidity. Zinc plated steel is not a stainless substitute, so for wet locations, exterior enclosures, or corrosive environments specify a stainless 8-32 instead.

No. The JTRM84 has a round head, which is a domed head that sits proud of the surface, not a flat countersunk or oval head that pulls into a chamfer. Use it where the hole is a plain through hole and a visible head is fine; for a finished flush look in a countersunk plate hole you want a flat or oval head 8-32.

They come in a jar, which is the format most electricians keep on the van or the shop bench for grab-and-go device screws rather than a loose bag that spills in a tool bucket.

Yes, these 8-32 tri-drive machine screws are USA made, which matters for institutional and government procurement where domestic sourcing is written into the purchase order.