Metallics JTRM103 1/4-20 x 1-1/2 in. Round Head Tri-Drive Machine Screws - Steel Zinc - Each

Yes. The JTRM103 is a 1/4-20 machine screw, meaning 1/4 inch diameter with 20 threads per inch, the standard coarse UNC pitch, so it mates with any 1/4-20 tapped hole, nut or strut channel nut. Grip length is 1-1/2 inches, so account for material thickness plus whatever thread engagement you need past the nut.

These are steel with zinc plating, which is a light corrosion coating meant for dry, indoor, protected work: enclosure covers, device plates, strut and panel assembly. For exterior, damp, or washdown locations, go to a stainless 1/4-20 machine screw instead, since zinc plating will eventually rust through where it is exposed to standing water or chlorides.

It stands proud. A round head has a domed top and a flat bearing face, so it sits on top of the material rather than sinking into it. If you need the head below or level with the surface, you want a flat head screw in a countersunk hole instead. Round heads are the usual choice on sheet metal enclosures and panels where there is no countersink prepped.

A machine screw has a uniform straight thread and no point, so it requires a mating thread: a tapped hole, a nut, or a channel nut. A sheet metal or self drilling screw cuts its own thread as it goes. If the hole in your enclosure or bracket is already tapped 1/4-20, or you are bolting through with a nut on the back, the JTRM103 is the right part. If you are driving into untapped sheet, it is not.

It comes in a jar, which is the format that holds up in a van drawer or on a shop shelf without the fasteners migrating the way bagged screws do. Handy if you are standardizing on one 1/4-20 size across a building and want it labeled and sealed between calls.