Metallics JTS24 8 x 2 in. Pan Head Phillips Sharp Point Tapping Screws - Steel Zinc - Each

Type A tapping screws like the Metallics JTS24 have a gimlet (sharp) point and a coarse 15 threads-per-inch thread, which is what lets them start in thin sheet metal and soft materials without a pilot hole. The coarse pitch and sharp point also drive into wood, which is why the 2 inch length is common for mounting boxes, straps and brackets through drywall into studs. For thicker steel or structural plate you want a self-drilling (Type B or TEK-style) screw instead, since a gimlet point will not cut heavy gauge.

No. The JTS24 is listed as not Buy American compliant and not ARRA compliant, with multiple countries of origin. On a federally funded job with domestic sourcing requirements you will need a domestically produced fastener instead.

That is what the JTS series is built for. Metallics lists the field application as the electrical, plumbing, heating and air conditioning trades, and the #8 x 2 in. pan head with a sharp gimlet point is the size commonly used for securing boxes, straps and hangers to studs and light framing. The 2 inch length gives you enough reach to pass through drywall or a plaster ring and still get solid thread engagement behind it.

A #2 Phillips bit. The pan head carries a Phillips recess 0.169 to 0.182 in. in diameter and 0.108 in. deep, which is the standard #2 geometry. A #1 bit will cam out and chew the recess; a #3 will not seat.

The JTS24 is steel with a zinc finish, which is a general purpose indoor and protected-location plating. It handles normal interior humidity fine, but direct weather exposure, wet locations and coastal or chemically aggressive environments will corrode zinc plating over time. For those jobs specify stainless steel fasteners.

They come in a jar of 100, and 100 is the order minimum. One jar weighs about 1 lb. That pack size suits a service van or a shop bin rather than a bulk production run.

Yes. Head and recess dimensions on the JTS24 follow ASME B18.6.3-2013 and the thread conforms to ASME B18.6.4, which is the tapping screw standard. One caveat Metallics states: dimensions for #9 diameter screws in the series fall outside ASME B18.6.4. The JTS24 is a #8, so it is covered.

It stands proud. A pan head has a flat bearing underside and a domed top, so it sits on top of the material rather than sinking in, and this one rises 0.105 to 0.115 in. above the surface. If you need the fastener flush with a cover plate or panel face, use a flat head screw in a countersunk hole instead.

Into thin sheet metal or soft material the gimlet point starts on its own, which is the point of a Type A screw. Driving into harder or thicker stock, a pilot hole keeps the screw from walking and protects it against the 39 lb-in torsional limit. If you are hitting hardwood or heavier gauge, pilot it.