Metallics TSP19M 8 x 1-1/4 in. Pan Head Phillips Sharp Point Tapping Screws - Steel Zinc - Each

They ship in a jar of 1,000, and 1,000 is the order minimum. Ordering is by the thousand rather than by the piece, so plan quantities in full jars.

No. The TSP19M is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your contract carries a domestic-sourcing clause, these will not satisfy it and you need a domestically produced fastener.

The Metallics TSP19M is a Type A tapping screw with a gimlet (sharp) point, so it forms its own thread as it drives into thin sheet metal, and its coarse 15 threads per inch grip soft, thin material. The sharp point starts in a pilot hole in sheet steel without needing a drill point. If you are fastening into heavier gauge steel or want a finer thread for a more consistent pull-out, a Type AB screw is the usual choice; if there is no pilot hole at all and the steel is thick, a self-drilling (Tek) screw is the right call instead.

A #2 Phillips bit. The recess on these #8 screws measures 0.169 to 0.182 in. in diameter, 0.108 in. deep, with a 0.03 in. recess width, which is standard #2 Phillips geometry. Stock #2 bits if you are running a thousand of these on a gun, because the recess is where cam-out happens.

The pan head on the TSP19M sits 0.105 to 0.115 in. above the surface and spans 0.306 to 0.322 in. across. That is a low, round-topped profile with a flat bearing underside, so it will not sink flush. If you need the fastener flush or countersunk, a flat head screw is the one to spec. The head dimensions follow ASME B18.6.3-2013.

These are carbon steel with a zinc plating, which is an indoor and protected-location finish. Zinc plate handles normal humidity and incidental moisture, but it is not a marine or sustained-wet finish. For exterior, wet, or corrosive runs, specify a stainless or hot-dip galvanized sheet metal screw instead.

Yes, that is the intended use. The TSP19M is an electrical-department tapping screw in the JTSP series, #8 diameter by 1-1/4 in. long, with a sharp gimlet point that threads into sheet metal studs, box ears, and strut or panel sheet. The 1-1/4 in. length gives you reach through a device bracket plus engagement in the stud; for thin single-layer sheet a shorter length wastes less thread.

Threads are to ASME B18.6.4 at 15 threads per inch, with head dimensions to ASME B18.6.3-2013. If a drawing calls out a B18.6.4 Type A sheet metal screw, this #8 meets that callout. Note that Metallics states dimensions for #9 diameter screws in this family fall outside B18.6.4, so a #9 substitution is not a standard-conforming swap.

The TSP19M is the #8 x 1-1/4 in. pan head Phillips configuration in a 1,000-count jar. Metallics notes other sizes and quantities in this series are available by request, so if you need a shorter or longer #8, ask for the matching JTSP part rather than substituting a different head or point type.