Metallics JSTSP22 10 x 1 in. Pan Head Phillips Tapping Screws - 18-8 Stainless - Each

The JSTSP22 is a Type A tapping screw with a gimlet point, which is the coarse-thread point made for thin sheet metal and soft materials where the screw forms its own thread in a pilot hole. Thread count is 12 per inch and the thread conforms to ASME B18.6.4. Drive it into a drilled or punched pilot hole in sheet steel, aluminum, or similar thin stock; it is not a machine screw and will not mate with a tapped nut or a threaded insert.

They can. Fastening 18-8 stainless parts to aluminum or steel can set up a galvanic couple in some environments, which corrodes the lesser metal around the fastener. Outdoors, in wet locations, or in coastal and chemical environments, that is the trade-off you take for the stainless corrosion resistance. In dry indoor panel and box work it is generally a non-issue.

No. The JSTSP22 tapping screws are not Buy American compliant and are not ARRA compliant, with multiple countries of origin. On a job carrying domestic preference clauses you will need a fastener sourced and documented as domestic.

A #2 Phillips bit. The recess is a Phillips drive measuring 0.186 to 0.199 inch in diameter and 0.124 inch deep, with a 0.031 inch recess width, so a #2 seats fully. A #1 will cam out and a #3 will not bottom in the recess.

Minimum torsional strength on this #10 screw is 48 lb-in. That is the point at which the fastener itself will twist off, so set an impact or screwgun clutch well below it. Stainless work-hardens and galls, so run at moderate speed rather than full trigger, especially in steel.

Head height runs 0.122 to 0.133 inch with a head width of 0.357 to 0.373 inch, built to ASME B18.6.3-2013 dimensions. That pan profile sits proud of the surface, so allow roughly an eighth of an inch of clearance under any plate or trim. If you need the head flush, a flat head screw in a countersunk hole is the better choice.

They ship in a jar, 100 pieces minimum. Jar weight is 0.77 lbs. Good for stocking a van or a shop bin rather than buying loose counts.

It is a sheet metal fastener for electrical, plumbing, heating and air conditioning work: mounting straps and brackets to enclosures, securing duct and panel components, hanging boxes and devices to thin steel. The 1 inch length gives enough thread engagement for stacked sheet or light structure while the 18-8 stainless holds up where plated steel would rust.