Metallics JRM89V 8-32 x 2 in. Round Head Combo Machine Screws - Steel Zinc - Each

No. The JRM89V is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If you are buying for a federally funded project with domestic sourcing requirements, you need a domestically produced 8-32 machine screw instead of this one.

A machine screw like the JRM89V has a straight, uniform 32 TPI machine thread with a blunt end, so it needs an existing tapped hole or a nut. It will not cut its own thread. Use it for the pre-tapped 8-32 holes you find in boxes, straps, panels, and enclosures. If you are fastening into bare sheet metal with no tapped hole, you want a self-tapping or sheet metal screw instead.

They take either a flat blade or a #2 Phillips. The head is a combo (slotted and Phillips) drive, with the Phillips recess sized for a #2 bit. Slot width runs 0.045 to 0.054 inch and slot depth 0.058 to 0.077 inch, so a cabinet-tip screwdriver seats properly. Handy on a service call when you only have one driver in your pouch.

They ship in a jar with a minimum order of 500 each. So you are buying a bulk jar, not a small blister pack, which is how most electrical contractors and MRO stockrooms want 8-32 device screws stocked.

The JRM89V is zinc plated carbon steel, which is a mild corrosion finish intended for dry interior use. For wet locations, exterior boxes, or washdown areas, go with a stainless machine screw in the same 8-32 x 2 size instead. Zinc plating will eventually rust through in standing moisture.

Minimum tensile strength is 60,000 psi, with hardness in the Rockwell B70 to B100 range, made from AISI 1006 to 1022 low carbon steel. That is standard low carbon machine screw strength, fine for device mounting, cover plates, strap and bracket work. It is not a structural or grade 5 equivalent fastener, so do not use it where a shear or load rating is specified on a drawing.

Head height on the JRM89V runs 0.107 to 0.12 inch with a head width of 0.287 to 0.309 inch. A round head is a raised, domed head, so it stands proud of the material rather than sitting flush. If you need the screw flush with a plate or panel face, you want a flat head countersunk screw in 8-32 instead.

Yes, combo means one screw with both a slot and a Phillips recess in the same head. Metallics was the first US fastener company to offer a full combo line, back in 1985. The Phillips recess measures 0.165 to 0.178 inch in diameter, 0.075 to 0.101 inch deep, with a 0.03 inch recess width and gaging depth of 0.064 to 0.090 inch, which is standard #2 Phillips geometry.

The JRM89V is the 8-32 x 2 inch round head combo in zinc plated steel, part of the Metallics JRM machine screw series. Other sizes and quantities in the same combo line are available by request, so if you need a shorter 8-32 for standard device mounting or a different pack size for a stockroom, ask for it by length and thread.