Metallics JDS159V Screws 8 X 2 Ih Hx 1/4Hd Sl TS St-zn (Jar 500)

The Metallics JDS159V is a thread forming Type A tapping screw with a gimlet point, meant to self-start in thin metal from 0.015 to 0.050 inch thick, or in resin-filled plywood. Above that thickness range you want a Type AB or a self-drilling screw instead, since the Type A thread is spaced wider and relies on the gimlet point biting thin stock.

Either. The head is an indented hex with a slot, so it takes a 1/4 inch hex driver or a flat blade. Head width runs 0.244 to 0.250 inch with 0.272 inch across the corners, head height 0.096 to 0.110 inch, and the slot is 0.045 to 0.054 inch wide by 0.052 to 0.066 inch deep. In practice crews run them with a 1/4 inch magnetic nut setter and keep the slot as backup for hand work in tight spots.

Yes. The indented hex head carries an integral washer with an outside diameter of 0.322 to 0.348 inch and a washer thickness of 0.019 to 0.031 inch. That bearing surface spreads load on thin sheet and on plywood so the head does not pull through, which is why these get used on strap, clip and box work rather than a plain pan head.

They ship 500 to a jar, and 500 count is the order minimum, so one jar is the smallest buy. The packed jar weighs 5 lbs and measures 4.5 by 4.5 by 7.25 inches, which matters if you are stocking a van shelf or a shop bin rather than a job box.

It is a #8 diameter, 2 inch long screw with 15 threads per inch. The full 2 inch length is what you need when you are reaching through furring, strapping or plywood into thin metal behind it; for fastening directly to sheet metal with no standoff, a shorter #8 Type A is the better call so you are not leaving an inch of exposed point behind the panel.

These are AISI 1016-1024 carbon steel with a zinc finish. Zinc plating is a mild, indoor-grade corrosion coating, fine for dry interior electrical and framing work but not a substitute for hot dip galvanized or stainless in wet, exterior or corrosive environments. For exterior or coastal work, step up to a stainless or hot dip galvanized fastener.

Torsional strength is 39 lb-in minimum with a case hardness of Rockwell C28-38, which is standard for a hardened tapping screw. Driving with a clutched drill or a low setting on an impact keeps you inside that. Hammering a #8 at full impact torque into stock thicker than the 0.015 to 0.050 inch range this screw is made for is the usual way heads twist off.

The JDS159V is flagged both ARRA compliant and Buy American compliant, with country of origin listed as multiple. For a federally funded job, that compliance flag is the line your submittal package needs, and it is the reason institutional and government buyers pick this line over an unflagged bulk screw.

Not the same. A Type A has wider spaced threads and a gimlet point, so it starts easily and holds well in thin sheet and resin-filled plywood. A Type AB runs a finer, closer thread and is the choice when you want more thread engagement in slightly heavier gauge. If your drawing calls out Type AB, the JDS159V is not a drop-in substitute.

Head and body dimensions follow ASME B18.6.3-2010, and the thread form follows ASME B18.6.4. Material is AISI 1016-1024 steel. One caveat worth noting on a submittal: dimensions for the #9 diameter in this Metallics screw family fall outside ASME B18.6.4, though that does not apply to this #8 size.

Other sizes and quantities in the Metallics JDS tapping screw line are available by request, so if you need a shorter #8 or a larger bulk count instead of the 500 piece jar, ask for it rather than buying around it.