Metallics JSRM100P Screws 12-24 X 3/4 Rh Ph MS SS (Jar 100)

Yes. 12-24 is the standard thread used for mounting devices, covers, and brackets to steel outlet and switch boxes, and the Metallics JSRM100P is a 12-24 x 3/4 inch machine screw. The 3/4 inch length gives you enough reach for a device yoke or a mounting bracket over a box ear without bottoming out in a shallow tapped hole, since machine screws cut no threads of their own and rely on the existing tapped hole or a nut.

Stainless steel. The JSRM100P is an SS machine screw, so it is the choice for damp, wet, or corrosive locations, exterior enclosures, and coastal work where a zinc-plated screw would rust and seize in the tapped hole. Note that stainless is softer than hardened plated steel, so drive it without over-torquing.

Round head with a Phillips recess (Rh Ph). The domed round head seats on a flat surface rather than countersinking, so it is used where there is no chamfered or tapered hole, and it drives with a standard Phillips bit.

No. The JSRM100P is a machine screw, so it needs a pre-tapped hole or a mating nut. For bare sheet metal with no threads, use a self-tapping or self-drilling screw instead, and for drywall or masonry use the appropriate anchor. Where you do have a tapped 12-24 hole, such as a steel box ear or a strut nut, this is the correct fastener.

100 screws per jar, packaged in a jar rather than a box or bag, which is what makes it practical to keep on a service van or a shop bench and scoop from without spilling. For MRO and electrical stock rooms, one jar covers a lot of device and cover plate replacements.

JSRM100P. That number covers the 12-24 x 3/4 inch stainless steel round head Phillips machine screw in the 100 count jar, and it is what to quote when ordering or restocking.