Metallics RM101-5M Screws 1/4-20 x 1 RH CD MS St-Zn (5000 pcs)

They are 1/4-20 x 1 inch machine screws, so a 1/4 inch diameter body with 20 threads per inch and a 1 inch length under the head. The 1/4-20 size is the common thread for threading into strut nuts, box and enclosure tapped holes, and 1/4-20 nuts, and the 1 inch length suits stacking a bracket or clamp against a surface rather than deep anchoring.

Yes. Strut channel nuts are commonly tapped 1/4-20, and the RM101-5M is a 1/4-20 machine screw, so the thread matches. Check your usable length though: at 1 inch overall, you have 1 inch minus the thickness of whatever bracket or clamp you are fastening left to engage the nut, so thick pipe clamps or layered steel may need a longer screw.

Round head with a combination drive, so you can drive them with either a flat blade or a Phillips bit. That matters on an electrical install where you are already holding a slotted screwdriver for terminal screws, no bit change needed. The round head sits proud of the surface, so it is not a fit where you need a flush face.

These are zinc plated steel, which is a mild corrosion coating meant for dry indoor use. For wet locations, exterior runs, or washdown areas, go with stainless rather than zinc plated steel, since the plating will eventually rust through where it gets scratched by a driver or wrench.

5,000 pieces in the box. That is a bulk contractor or MRO quantity, meant for a shop crib or a fleet of repeat installs, not a single job. If you only need a handful, a smaller count pack of the same 1/4-20 x 1 inch machine screw is the better buy.

A machine screw has a uniform straight thread with a blunt end and needs a mating tapped hole or a nut, which is what the RM101-5M is. A sheet metal or self-tapping screw has a sharper, coarser thread that cuts its own hold in thin material. If you are fastening into an existing tapped hole in a box, enclosure, or strut nut, the machine screw is the right part; if you are driving into bare sheet steel with no tapped hole, it is not.

No. The RM101-5M is screws only, 5,000 pieces of the 1/4-20 x 1 inch round head machine screw. If you are not threading into an already tapped hole, order 1/4-20 nuts, and add flat or lock washers separately if the assembly calls for them.

Yes, the Metallics part number is RM101-5M and it is the single orderable item, a 1/4-20 x 1 inch round head combination drive zinc plated steel machine screw in a 5,000 piece carton. Order by that number for a repeat buy with no option choices to specify.