Metallics RMK1024 Screws 10-24 Rh Cd MS Kit St-zn 245 P (Trey 1)

The RMK1024 tray holds 245 round head 10-24 machine screws in five lengths: 100 at 1/2 inch, 50 at 3/4 inch, 40 at 1 inch, 30 at 1-1/4 inch, and 25 at 1-1/2 inch. Everything in the tray is the same 10-24 thread, so the only choice you make at the panel is length.

Yes. 10-24 is the thread used for device and cover mounting in steel outlet boxes, mud rings and enclosure strips, and these are cut 24 threads per inch to that size. The assortment of 1/2 through 1-1/2 inch lengths is there so you can reach through built-up ring and plaster depths without stacking washers. Note it is 10-24 only, not 10-32 - if the box tapping is 10-32, these will cross-thread and ruin it.

No. The RMK1024 kit is not Buy American compliant and is not ARRA compliant, and the country of origin is listed as multiple. If your contract carries a domestic-sourcing clause, this tray will not satisfy it and you need a domestically produced fastener.

Either. The heads are combination slotted/Phillips, so a flat blade or a Phillips works. For the Phillips recess, a #3 driver is the called-out size, and the recess runs 0.182 to 0.195 inch in diameter with a 0.093 to 0.119 inch depth. The slot measures 0.05 to 0.06 inch wide and 0.065 to 0.087 inch deep, so a standard cabinet-tip flat blade seats fine.

Head width runs 0.334 to 0.359 inch with a head height of 0.123 to 0.137 inch. That is a domed round head roughly a third of an inch across, so it covers a clean 10-24 hole and a little slop, but it sits proud of the surface rather than flush. If you need the fastener flush in a plate or a flat-face enclosure, specify a flat head instead of this round head kit.

They are low-carbon steel to AISI 1006-1022 with a 60,000 psi minimum tensile strength and a hardness of Rockwell B70-B100. That is standard commercial machine screw strength, fine for devices, covers, brackets and strut accessories. It is not a graded structural fastener, so for anything carrying real load use a Grade 5 or Grade 8 bolt instead.

The finish is zinc plating on steel, which is meant for dry indoor use. In wet, outdoor or washdown areas zinc plate will rust once the coating is scratched or the screw is cut, so for those openings go to stainless machine screws instead. Keep this tray for interior panel, box and device work.

It ships as a compartmented tray with the five lengths separated, 245 screws total, and the minimum order is one each. That makes it a stock-the-van or stock-the-shop item rather than a bulk box, and the tray keeps the lengths from mixing in a gang box.

Yes. The RM series machine screws are available in other sizes and quantities by request, so if a job runs heavy on one length you can source that length on its own instead of buying trays for the few you need. The kit, model RMK1024, is the mixed-length version.