Metallics JSRM19 8-32 x 1-1/2 in. Round Head Slotted Machine Screws - 18-8 Stainless - Each

Yes. The JSRM19 is an 8-32 machine screw with 32 threads per inch, which is the thread used on outlet box device mounting holes, cover plates and fixture yokes. At 1-1/2 inches long it reaches through spacers, extension rings or built-out drywall where a short box screw bottoms out. Metallics lists it for electrical, plumbing, heating and air conditioning work.

No. The JSRM19 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing language, this screw will not satisfy it.

Often yes. A 1-1/2 in. shank is far longer than a standard device mounting screw, so in a flush-mounted box it will bottom out or run past the threaded ear. The JSRM19 is the one to reach for when you are building out through a mud ring, plaster ring, spacer or thick finish material, or through-bolting bracket stacks. For a plain flush device mount, use a shorter 8-32.

Round head sits proud of the surface, so the JSRM19 works where the hole is not countersunk, which covers most sheet metal boxes, brackets and straps. Head width runs 0.287 to 0.309 in. with a head height of 0.107 to 0.12 in., so it bears on the metal around the hole rather than pulling into it. If your part has a countersunk hole and the fastener has to finish flush, use a flat head screw instead.

18-8 stainless is the usual pick for wet and outdoor work, and that is what the JSRM19 is made from, so it holds up in exterior boxes, damp mechanical rooms and washdown areas far better than a plated steel screw. It is not a marine-grade alloy, so for direct salt spray exposure step up to 316.

The JSRM19 ships as a jar of 100 screws, and the jar is the order minimum, so 100 is the smallest quantity. Jar weight is 0.84 lbs. Other sizes and quantities are available by request.

Metallics rates the 18-8 stainless at 80,000 psi minimum tensile with a hardness of Rockwell B85-B95, built to SAE material standards. Those stainless values are approximations, since there is no single performance standard for stainless machine screws. If a drawing calls out a graded steel fastener with a specific proof load, specify a graded steel screw rather than stainless.