Metallics JSRM15 8-32 x 1/2 in. Round Head Slotted Machine Screws - 18-8 Stainless - Each

Yes. The JSRM15 is an 8-32 machine screw, which is the standard thread used for receptacle and switch yoke holes and for mounting device plates in the US. It runs 32 threads per inch and measures 1/2 inch long, so it has enough reach for a device mounted flush in a box but will not bottom out in a deep yoke stack. The round head measures 0.287 to 0.309 inch across and 0.107 to 0.12 inch tall, so it sits proud of the plate rather than flush.

No. The JSRM15 is not Buy American compliant and is not ARRA compliant; country of origin is listed as multiple. If your project carries a domestic-sourcing requirement, this screw will not satisfy it and you need a domestically produced 8-32 round head stainless screw instead.

The JSRM15 is made of 18-8 stainless, the common 300-series austenitic grade used where corrosion is the concern, so it holds up far better than plain or zinc-plated steel in wet, washdown, and exterior-exposed locations. Metallics lists the screw for electrical, plumbing, heating and air conditioning work, which is exactly the mix of damp environments 18-8 gets specified for.

They come in a jar of 100, and 100 is the order minimum. The jar is the stock pack, so if you need a few hundred for a panel build or a plate change-out across a building you are ordering in multiples of 100 rather than picking individual screws. Jar weight is listed at 0.41 lbs.

Round head, like the JSRM15, has a domed top that bears on the surface of the plate and needs no countersink; that is what you want on a plain drilled or stamped hole. A flat head is only right where the part has a countersunk seat and the screw must finish flush. On the JSRM15 the head stands 0.107 to 0.12 inch tall and spans 0.287 to 0.309 inch, so budget for that profile sitting above the surface.

Tensile strength is 80,000 psi minimum with a hardness of Rockwell B85 to B95. That is solid for device and cover work but softer than a hardened alloy screw, so stainless galls and the slotted head strips before the threads do if you lean on it with a driver. Metallics also notes that tensile figures for stainless screws are approximations, since there is no single performance standard for stainless machine screws. Material standard is SAE.

Yes. The JSRM15 is the 8-32 x 1/2 inch size in the Metallics SRM round head slotted machine screw series, and other sizes and quantities in the series are available by request. If your device stack, strap, or standoff needs more reach, ask for the longer length in the same 18-8 stainless round head slotted configuration.