Metallics JRM148SLT 6-32 x 6 in. Round Head Slotted Machine Screws - Steel Zinc - Each

Yes. The Metallics JRM148SLT is a 6-32 thread at 32 threads per inch, which is the thread used on device box and switch/receptacle mounting holes. What makes it unusual is the 6 inch length, which is there for reaching through thick stacks: deep extension rings, plaster build-out, mud rings on furred walls. It's a machine screw, so it needs an existing tapped hole or a nut on the back side; it will not cut its own thread in sheet metal.

Plated, not stainless. These are low carbon steel with a zinc finish, made from AISI 1006 to 1022 stock. Zinc plating handles indoor and dry, protected locations. For wet locations, exterior boxes, coastal air, or anywhere the screw sees standing moisture, go stainless instead. Zinc plating is a sacrificial coating and it will eventually give up in those conditions.

They're flagged compliant for both ARRA and Buy American, with country of origin China. On a federally funded project where the specification actually enforces domestic melt and manufacture, that origin is what your compliance officer will look at first, so bring both facts to them before you commit the material to the job.

A 6 inch 6-32 is the right fastener when the tapped hole is still in the original box and everything between the device and that hole is build-out: extension rings, mud rings, thick plaster or tile. The screw simply spans the gap and threads into the ear that was always there. If instead you're fastening to something with no 6-32 threads in it, a machine screw won't help, no matter the length, because it needs a tapped hole or a nut behind it. The JRM148SLT is that long-reach 6-32 in a round head, slotted drive, zinc plated steel.

Slotted drive, so it takes a flat blade. The slot runs 0.039 to 0.048 inch wide and 0.051 to 0.068 inch deep, which is a narrow, shallow slot on a 0.24 to 0.26 inch head. Drive it by hand or on a low clutch setting. A slot that shallow will let a blade ride out under torque, and at 6 inches of unsupported shank the screw wants to wobble before it starts.

It stands proud. The JRM148SLT has a round head measuring 0.091 to 0.103 inch high and 0.24 to 0.26 inch across, sitting on top of the surface rather than sinking into it. If you need the head buried, you want a flat head screw in a countersunk hole, not this one. Round head is the right call when you're clamping through a plate or a cover and there's no countersink to work with.

Rated at 60,000 psi minimum tensile, with a hardness of Rockwell B70 to B100. That's standard low carbon commercial grade, not a high strength alloy screw. On a 6-32 shank the useful clamp load is small and the failure mode is a snapped screw or a stripped thread in the box, so seat it snug and stop. If the job calls for a graded fastener on a structural connection, this isn't it.

You can. The JRM148SLT is low carbon steel, AISI 1006 to 1022, at Rockwell B70 to B100, soft enough to cut cleanly with a screw cutter or bolt cutter jaw and chase the end with a file or die. Cutting is common practice with long 6-32s where the exact stack thickness varies opening to opening. Be aware the cut end loses its zinc plating, so a trimmed screw in a damp location will start rusting at the tip.