Metallics JSTSP24 10 x 1-1/2 in. Pan Head Phillips Tapping Screws - 18-8 Stainless - Each

The JSTSP24 is a Type A tapping screw with a gimlet point, which is the sharp, pointed thread form meant to start itself in thin sheet metal and similar light materials. Thread count is 12 per inch to ASME B18.6.4. Type A is a thin-gauge fastener, so in heavier stock you still want a pilot hole, and in that case a Type AB or self-drilling screw is the better call.

You can, but be aware of galvanic corrosion. Fastening stainless steel parts to aluminum or steel can set up a galvanic couple in some environments, which attacks the less noble metal. Outdoors, in wash-down areas or anywhere salt is present, isolate the joint or pick a fastener that matches the base metal. Indoors and dry, the 18-8 stainless is generally fine.

No. The JSTSP24 is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. On a federally funded project with domestic sourcing requirements, these will not pass; you will need a domestically produced fastener instead.

A #2 Phillips bit drives the JSTSP24. The recess is cut to a 0.124 inch depth, 0.186 to 0.199 inch diameter and 0.031 inch width, so a #2 seats fully and keeps the cam-out down when you are running these overhead into sheet metal.

48 lb-in minimum torsional strength on the JSTSP24. That is the number to respect if you are driving with an impact or a clutchless drill, since 18-8 stainless twists off rather than stripping. Set the clutch low and let the gimlet point do the work.

They ship in a jar of 100, which is the order minimum. Shipping weight on the jar is 0.98 lbs. If you need a different size or count in the same pan head Phillips stainless tapping screw, Metallics offers other sizes and quantities by request.

Metallics lists the JSTSP24 for the electrical, plumbing, heating and air conditioning industries. In practice that is mounting straps and clamps, securing cover plates and device boxes, fastening duct accessories and hanging light brackets to sheet metal. The 18-8 stainless makes it the choice where a plated steel screw would rust, such as damp mechanical rooms or coastal rooftop work.