Metallics JSRM146 10-24 x 2 in. Round Head Slotted Machine Screws - 18-8 Stainless - Each

The round head measures 0.334 to 0.359 in. across and 0.123 to 0.137 in. high, so it sits proud of the surface by roughly an eighth of an inch. That is fine for strap and bracket work, but it will not sit flush under a tight cover plate or in a countersunk hole. If you need the head below the surface, specify a flat head instead of this round head.

No. The JSRM146 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic-sourcing clause, this screw will not satisfy it and you need a domestically produced fastener instead.

18-8 stainless is the austenitic grade used where plated steel screws would rust out, so it holds up in wet locations, exterior boxes, and washdown areas far better than a zinc-plated screw. It is also non-magnetic in service and will not stain the surrounding finish. For straight dry interior work a plated screw does the same job; the stainless earns its keep when moisture or corrosive atmosphere is in play.

They ship in a jar, 100 pieces, and 100 is the order minimum. So you are buying a shop jar for the van or the maintenance bench, not loose count. Metallics lists other sizes and quantities as available by request.

Tensile strength is listed at 80,000 psi minimum with a hardness of Rockwell B85-B95. Metallics notes that tensile values for stainless screws are approximations only, since there is no single performance standard for stainless machine screws, so for a structural or rated load connection use a fastener with a published grade. For the usual electrical, plumbing, and HVAC mounting these are intended for, 80,000 psi is ample.

Machine screws like the SRM series have a straight, uniform 24 TPI thread with no point, so they go into a tapped hole, a threaded boss, or a 10-24 nut. They will not cut their own thread in sheet metal or wood, that takes a self-tapping or sheet metal screw. The 2 inch length gives you plenty of thread to pass through a stack of material and still pick up a nut on the back side.

The 100-count jar weighs 1.43 lbs and the package measures 3 in. wide by 3 in. long by 4.57 in. high, so it drops into a parts bin or a drawer in a service truck without taking up a shelf.