Metallics JSRM140P 3/8-16 x 2 in. Round Head Phillips Machine Screws - 18-8 Stainless - Each

They are 3/8-16 x 2 inch round head machine screws: 3/8 inch nominal diameter with 16 threads per inch, and a 2 inch length measured under the head. The coarse 16 TPI pitch means they mate with standard 3/8-16 nuts and tapped 3/8-16 holes, not with fine-thread 3/8-24 hardware.

The JSRM140P screws are 18-8 stainless, the common austenitic grade used for corrosion resistance in wet and washdown locations, so they won't rust-streak a box or seize the way plated carbon steel does. Hardness is Rockwell B85-B95. For MRO work in mechanical rooms, rooftop units, and outdoor panels, that is the usual reason to specify stainless over zinc-plated.

No. Metallics lists 80,000 psi minimum tensile for the 18-8 stainless, but states plainly that tensile values for stainless screws are approximations only because there is no single standard governing the performance requirements of stainless machine screws. Treat it as a guide for general equipment mounting, not as a rated value for a load-bearing or engineered connection.

No. The JSRM140P 18-8 stainless machine screws are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. For federally funded work carrying domestic sourcing requirements you'll need a domestically produced fastener instead.

A #4 Phillips bit. The recess on these is large: 0.374 to 0.387 inch diameter, 0.202 to 0.228 inch deep, with a 0.064 inch recess width and a gaging penetration depth of 0.182 to 0.208 inch. A #2 or #3 bit will cam out and chew the recess, so stock a #4 before you start the run.

They ship in a jar of 100, and 100 is the minimum order quantity. The jar weighs 6.49 lbs. If you need a different size or a different count, Metallics offers other sizes and quantities by request.

Metallics builds the SRM round head machine screw line for the electrical, plumbing, heating and air conditioning trades. Typical use is bolting equipment, brackets, strut fittings, box covers and panel components into tapped holes or through-holes with a nut. Because it's a machine screw, the threads run full length style for mating with a tapped hole or nut, it does not form its own thread in sheet metal the way a self-tapper does.