Metallics JRMB140 6-32 x 2-1/2 in. Round Head Slotted Machine Screws - Brass - Each

The Metallics JRMB140 is a 6-32 thread, 32 threads per inch, made to ANSI/ASME B1.1 thread standard, so it mates with any standard 6-32 tapped hole or nut. Head is round with a slotted drive, measuring 0.24 to 0.26 in. across and 0.091 to 0.103 in. high, so the head sits proud of the surface rather than flush. If you need the head buried in a countersink, a round head is the wrong choice.

Both the ARRA and Buy American compliance flags on the JRMB140 read compliant, which is what a government, school district, or municipal procurement officer needs on the submittal. Country of origin is listed as multiple.

Brass is the material here, and it is chosen for corrosion resistance and for the fact that it is non-magnetic and non-sparking. Where a steel screw would rust in a damp or exterior enclosure, brass holds up. The trade is strength: brass is softer than steel, so don't torque it like a hardened fastener, and if you need high clamp load, go to a steel or stainless 6-32 instead.

These ship 100 to a jar and 100 is the order minimum, so it's a full jar or multiples of it, not a handful off the shelf. For an electrician stocking a truck or an MRO crib standardizing on one device screw, that's the buying unit.

Head geometry is built to ASME B18.6.3, the dimensional standard for slotted and recessed head machine screws, so the 0.24 to 0.26 in. head diameter and 0.091 to 0.103 in. height fall inside the published tolerance band for a 6-32 round head. If the drawing calls for a B18.6.3 round head machine screw, this meets it.

Slotted drive, so a flat blade. The slot is 0.039 to 0.048 in. wide and 0.051 to 0.068 in. deep, which is a standard small cabinet-tip flat driver. A slot won't self-center the way a Phillips or square drive does, so it's a hand-driving screw rather than one you'd run in with an impact.

Field application covers electrical, plumbing, heating and air conditioning. It's a general-purpose 6-32 machine screw, so a mechanical contractor mounting a control or a plumber fastening an escutcheon uses the same fastener an electrician uses on a device.

JRMB140, from the Metallics JRMB series of brass round head slotted machine screws. The series prefix runs across the brass round head line, with the numeric suffix setting the diameter and length combination, so JRMB140 specifically is the 6-32 x 2-1/2 in.

0.89 lbs for the jar of 100, in a container measuring 3 x 3.6 x 3 inches. Small enough to keep several sizes in a van bin without eating shelf space.