Metallics JFM22 1/4-20 x 3/8 in. Flat Head Slotted Machine Screws - Steel Zinc - Each

Yes. The JFM22 is a 1/4-20 UNC screw, 20 threads per inch, cut to ANSI/ASME B1.1. Any 1/4-20 coarse tapped hole, nut, or threaded insert will take it. At 3/8 inch long it is a short screw, so the usable grip is thin material plus the tapped depth, not a through-bolt for thick assemblies.

It will, provided the countersink matches a standard 82 degree flat head. The JFM22 head measures 0.442 to 0.477 inch across and 0.131 to 0.153 inch high, built to ASME B18.6.3-1998, so it drops into any countersink cut for a standard 1/4-20 flat head machine screw and finishes level with the surface. If your plate has a flat, uncountersunk hole, you want a pan or round head instead.

No. The JFM22 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. For a federally funded job carrying domestic sourcing requirements, you will need a fastener line certified to those terms.

It ships in a jar of 100, which is the minimum order quantity. If you need a different size or a different count, Metallics offers other lengths and pack quantities on request.

A flat blade screwdriver. The drive is a single slot, 0.064 to 0.075 inch wide and 0.046 to 0.07 inch deep, so a medium cabinet-tip blade seats well. There is no Phillips or square recess, so if your crew is running bit drivers you will want a slotted bit on hand before the install.

The JFM22 is low carbon steel with a zinc finish, made from AISI 1006 to 1022 steel. Zinc plating handles indoor and protected locations well, which is where electrical, plumbing, and HVAC work typically puts them. For wet, washdown, coastal, or buried conditions, specify stainless machine screws instead, since plated steel will eventually corrode once the zinc layer is compromised.

A machine screw like the JFM22 has a uniform 1/4-20 UNC machine thread with no point, so it needs a pre-tapped hole or a nut. If you are driving into unthreaded sheet metal, a tapping or sheet metal screw is the correct part. Where there is an existing 1/4-20 thread, as on most electrical boxes, strut fittings, and enclosure hardware, the machine screw is what belongs there.

The jar weighs 0.685 lbs and measures 3 in by 3 in by 2.15 in, so it stacks easily into a van bin or a parts drawer alongside other Metallics FM and FMP series screws.