Metallics JFMP30 10-24 x 1-1/4 in. Flat Head Phillips Machine Screws - Steel Zinc - Each

The Metallics JFMP30 is a 10-24 UNC screw, 24 threads per inch, cut to ANSI/ASME B1.1. That is the thread used on steel outlet box and device-ring tapped holes, so it mates with 10-24 tapped prep. At 1-1/4 inch long it is longer than the usual box screw, so it suits deep plaster rings, mud rings, and stacked extension rings rather than flush device mounting.

No. The JFMP30 is listed as not Buy American compliant and not ARRA compliant, with multiple countries of origin. If your contract carries a domestic content clause, you need a domestically sourced 10-24 flat head machine screw instead.

A #2 Phillips. The recess measures 0.198 inch diameter and 0.124 inch deep, with a 0.032 inch recess width, so a #1 bit will cam out and a #3 will not seat. Stock #2 bits on the cordless if you are running a jar of these.

These ship 100 to a jar, and the jar is the minimum order unit. No partial counts. Jar weight is listed at 0.9 lbs. Metallics lists other sizes and quantities as available by request if 100 of the 1-1/4 inch is not the count you need.

1050 lb minimum tensile on the JFMP30, with the steel running Rockwell B70 to B100. The stock is low carbon steel in the AISI 1006 to 1022 range. That is ordinary commercial machine screw material, fine for mounting devices, straps, brackets, and covers, not a substitute for a graded cap screw in a structural or lifting connection.

Zinc plated low carbon steel, which is a dry-location finish. It holds up indoors in panels, boxes, and mechanical rooms, and the zinc yellow plating is common in electronics work. For wet locations, exterior runs, coastal sites, or anywhere washdown happens, go to a stainless 10-24 machine screw instead; plated steel will bleed rust.

A machine screw like this one has a uniform straight 10-24 thread and no point, so it needs a pre-tapped hole or a nut on the back side. If you are fastening into unthreaded sheet metal with nothing behind it, a self-tapping sheet metal screw is the right part. Metallics lists this FM and FMP series for electrical, plumbing, and HVAC work, where tapped boxes, straps, and enclosure holes are already threaded.

Yes. The head and recess geometry follows ASME B18.6.3-1998 and the thread follows ANSI/ASME B1.1, with a 0.313 gaging diameter and protrusion 0.025 to 0.042 above gage. That is enough to cite on a submittal where a spec calls for standard flat head Phillips machine screws.