Metallics JRM93SLT 10-24 x 1 in. Round Head Slotted Machine Screws - Steel Zinc - Each

Yes. The Metallics JRM93SLT is a 10-24 thread with 24 threads per inch, which is the standard machine screw thread used for outlet box mounting holes, device yokes, and cover plates in US electrical work. At 1 inch long it reaches through a plaster ring or box ear plus a little depth, so it is a common replacement when the factory screw is stripped or lost.

It stands proud. The round head measures 0.334 to 0.359 in. across with a head height of 0.123 to 0.137 in., so it domes above the surface rather than sinking in. If you need the head flush or below the surface in a countersunk hole, you want a flat head machine screw instead, not this round head.

These are carbon steel with a zinc finish, which is a mild indoor corrosion coating. Zinc plated steel is fine in dry interior boxes, panels, and enclosures, but in damp, exterior, coastal, or washdown locations the plating sacrifices and the steel underneath rusts. For those openings specify a stainless 10-24 round head slotted screw instead.

These ship 100 to a jar, and 100 count is the order minimum. If you only need a handful for one device box, you are still buying the jar, which is the practical way MRO and electrical crews stock a common 10-24 size.

The JRM93SLT carries a 60,000 psi minimum tensile strength with a hardness of Rockwell B70 to B100, made from AISI 1006 to 1022 low carbon steel. That is standard commercial machine screw strength, good for mounting devices, covers, straps, and brackets. It is not a structural or high strength grade, so do not torque a slotted drive like a hex cap screw; the slot will deform before the shank yields.

The Metallics JRM93SLT is flagged Buy American compliant and ARRA compliant in the product record, with country of origin China. Government, school, and institutional buyers working to those provisions should take the compliance flags together with the stated origin when they document the submittal.

A 10-24 machine screw like this one has a uniform straight thread and needs a mating tapped hole or a nut. That is what you have in an outlet box ear, a device strap, a panel, or a strut nut. If the hole is unthreaded sheet metal or you are forming the thread as you drive, a machine screw will spin without biting and you want a self tapping or sheet metal screw instead.

A jar runs 0.81 lbs, with the package measuring 3 in. by 3 in. by 2.15 in. Useful if you are consolidating a fastener order onto a pallet or sizing a van stock bin.