Metallics JRM125SLT 12-24 x 2 in. Round Head Slotted Machine Screws - Steel Zinc - Each

It will sit proud. A round head is a domed, raised head, measuring 0.382 to 0.408 in. across and 0.139 to 0.153 in. tall on the JRM125SLT. That is fine where the head is exposed or seats against a flat surface, but if the hardware has a countersunk hole and you need the head flush with the surface, order a flat head machine screw in the same 12-24 x 2 instead.

No. The drive on the JRM125SLT is a plain slot, 0.056 to 0.067 in. wide and 0.073 to 0.096 in. deep, so it takes a flat blade screwdriver or a slotted power bit sized to that slot. A Phillips or square driver will not engage. If you want a combination head that accepts more than one bit, Metallics also builds combo-drive machine screws.

Often, yes. Two inches is a deep-reach length, used when rings, tile, thick board or a recessed box put the device well forward of the mounting ears. On a flush box with a standard plaster ring the screw will bottom out or stand off, so keep a shorter 12-24 on the truck for normal work and use the 2 inch JRM125SLT for the deep conditions. Threading is identical at 24 TPI, so the same tapped hole accepts either.

They ship in a jar with a 100-count minimum, so one order is 100 screws rather than a single piece. Total packed weight is 1.98 lbs. For a crew stocking a van or a facility keeping a device-screw bin, that is one jar per common length.

Zinc plating over steel is a mild corrosion coating meant for dry interior work: panel boards, device mounting, enclosure covers inside conditioned space. The JRM125SLT is zinc plated carbon steel to AISI 1006-1022. For wet locations, exterior enclosures, coastal air or washdown areas, specify a stainless machine screw in the same 12-24 x 2 size instead.

The JRM125SLT carries a C designation on both Buy American and ARRA compliance, with China listed as the country of origin. Submittal reviewers on federally funded work usually want the origin on record, so take the origin as the governing fact when you build the package.

The JRM125SLT is rated 60,000 psi minimum tensile with a hardness of Rockwell B70-B100, which is standard low carbon machine screw strength. That is sized for mounting devices, covers, plates and light fixtures into tapped holes or nuts, not for structural or high load bolted connections. For load bearing work step up to a graded bolt.

Metallics builds the JRM round head slotted machine screw line in other sizes and quantities on request, so the same 12-24 thread is available at lengths other than the 2 inch JRM125SLT. If you are standardizing a facility bin on one thread and one drive, ask for the lengths you need in the same series.