Metallics JDS157V Screws 8-15 X 1-1/2 Ih Hx 1/4Hd Sl TS (Jar 500)

The Metallics JDS157V is a Type A thread forming tapping screw with a gimlet point, made to self-start in thin metal from 0.015 to 0.050 inch thick, and in resin-filled plywood. Above that thickness range you want a Type AB or a self-drilling screw instead, since the Type A's wide thread spacing and sharp point rely on thin stock to form the thread.

Metallics lists the JDS157V as both ARRA compliant and Buy American compliant. Country of origin is multiple, so if your submittal requires a single named origin, that is the one item to pin down with the mill cert.

Either. The head is an indented hex with a slot, so a 1/4 inch hex driver or a flat blade both work. The hex measures 0.244 to 0.25 inch across the flats and 0.272 across corners, and the slot runs 0.045 to 0.054 inch wide and 0.052 to 0.066 inch deep. Overhead or awkward work goes faster with the hex socket; the slot is there when you cannot get a socket on it.

Yes, the JDS157V has an integral washer face under the hex head, with an outside diameter of 0.322 to 0.348 inch and a thickness of 0.019 to 0.031 inch. That gives you a little more bearing surface on thin sheet than a plain hex head, which matters when you are fastening into 0.015 inch stock and do not want to pull the screw through.

The JDS157V is carbon steel with a zinc finish, which is a dry-interior or protected-location plating. It is fine inside panels, enclosures, and duct runs, but for exterior, wet, or coastal exposure specify a stainless or hot dip galvanized fastener instead.

Threads are 15 per inch on a #8 body, formed to ASME B18.6.4, with head dimensions to ASME B18.6.3-2010. Steel is AISI 1016 to 1024 case hardened to Rockwell C28-38, with a minimum torsional strength of 39 lb-in. That hardness is what lets the gimlet point form its own thread in thin sheet without the screw shearing off in the driver.

These ship in a jar of 500 pieces, and 500 count is the order minimum. One jar is the smallest buy. The packed jar weighs 3.75 lbs.

Head height on the JDS157V runs 0.096 to 0.11 inch, with the washer face adding 0.019 to 0.031 inch of bearing thickness. That is a low profile for a hex head, which helps where a cover plate, trim, or adjacent panel has to sit close over the fastener.

Metallics offers other sizes and quantities of the JDS indented hex head slotted tapping screw by request, so if 1-1/2 inch length or the 500 piece jar is not what your job needs, the same screw can be sourced in another configuration.