Metallics JRWS7V 8 x 1/2 in. Round Washer Head Combo Sharp Point Tapping Screws - Steel Zinc - Each

The JRWS7V is a #8 diameter screw, 1/2 inch long, with a round washer head and a combo drive, meaning it takes either a Phillips bit or a square (Robertson) bit. Handy on a panel job where you already have a #2 Phillips in the gun but want the square for better bit engagement overhead.

No pilot hole in thin sheet. These are sharp point tapping screws, so the point pierces and the thread forms its own mating thread as it drives. That is the usual pick for light gauge steel, device boxes, mounting straps, and sheet metal enclosures. For heavy structural steel you want a self-drilling point instead, since a sharp point will just spin on thick stock.

The round washer head on the JRWS7V gives a wider bearing surface than a pan head, so it spreads clamp load and will not pull through a slotted bracket, strap, or thin sheet metal flange. That is why it gets used for securing straps, clips, and covers where the hole is slightly oversized or elongated.

Steel with a zinc plating. Zinc gives corrosion resistance for dry interior and normally protected locations, which covers most indoor conduit, box, and panel work. For wet locations, exterior exposure, or corrosive environments, step up to stainless rather than relying on zinc plated steel.

They ship in a jar, 500 pieces. The jar is the format most electricians keep on the van or in a bin rack, since it reseals and you can pour out a handful without the screws scattering through the toolbox.

Made in the USA. That matters on public and institutional work where the specification or the funding source carries a domestic sourcing requirement, so it is worth noting on the submittal.