Metallics JTS28V 10 x 1 in. Pan Head Phillips Sharp Point Tapping Screws - Steel Zinc - Each

The JTS28V is a #10 x 1 inch Type A tapping screw with a gimlet (sharp) point. Type A threads are the coarse, widely spaced sheet metal thread, 12 threads per inch here, and the sharp point lets it start in sheet metal, electrical enclosures, junction box covers, and thin steel or wood without a pilot in light gauge. It's not a machine screw, so it won't thread into a tapped 10-32 hole.

Head and recess dimensions follow ASME B18.6.3-2013, and the thread form follows ASME B18.6.4. That means the JTS28V interchanges with any other #10 x 1 in. Type A pan head Phillips screw built to those same standards, so it can replace a competitor's screw of the same designation without changing hole prep or driver.

A #2 Phillips bit. The recess on the JTS28V runs 0.186 to 0.199 inch in diameter at 0.124 inch deep, which is the standard Phillips II geometry a #2 bit seats in. A #1 will cam out and a #3 won't bottom.

It's case hardened to Rockwell C28-38 with a 48 lb-in minimum torsional strength, which is the hardness range a Type A sheet metal screw needs to cut its own thread in light gauge steel. Drive it with a clutch or low-speed driver; past that torque figure the shank will twist off rather than keep turning.

The JTS28V is carbon steel with a zinc plated finish, made from AISI 1016-1024 steel. Zinc plating is a dry-location and indoor-protected coating, fine inside panels, boxes, and conditioned spaces. For wet locations, coastal exposure, or direct weather you want stainless or a hot-dip/coated fastener instead, since plated zinc will eventually bleed rust.

The JTS28V is flagged compliant for both Buy American and ARRA, with China listed as the country of origin. On federally funded or publicly bid work, submit those compliance flags with your material list, since the governing rule depends on the specific funding program for your job.

They ship in a jar of 500 count, which is the minimum order quantity. The jar weighs 3.75 lbs and measures 3 x 3 x 4.57 inches, so it drops into a van shelf or job box easily. Buyers standardizing on #10 x 1 in. fasteners across a facility usually stock it by the jar rather than counting pieces.

One inch of screw with 12 threads per inch gives about a dozen threads of engagement, more than enough for sheet metal, box covers, strut fittings, and thin wood, but it will bottom out if you're going through thick stacked material. Metallics makes the JTS series in other diameters and lengths, so a longer or heavier screw in the same Type A pan head Phillips configuration can be sourced by request.