Metallics JRWS9 8 x 1 in. Round Washer Head Combo Sharp Point Tapping Screws - Steel Zinc - Each

The JRWS9 is a combo drive, so it takes either a Phillips bit or a square (Robertson) bit. Handy on a ladder, since whichever driver is already in your pouch will seat it. The round washer head spreads the clamp load, which is why these get used for fastening straps, clips and plates where a flat head would pull through.

It's a #8 diameter by 1 inch long sharp point tapping screw. At 1 inch it is a short fastener, good for anchoring into wood studs, plywood backing or sheet metal where you only need an inch of bite, not for through-fastening thick stacked material.

No. These are sharp point tapping screws, not self-drilling (no drill flute at the tip). They'll start in wood or thin sheet metal on their own, but for heavier gauge steel you want a self-drilling point screw instead.

They're zinc plated steel, which is a general indoor corrosion coating. Fine for interior electrical work, panel and device mounting, and dry mechanical rooms. For exterior, treated lumber or wash-down areas, move to stainless or a coated exterior-rated fastener.

Yes, the JRWS9 #8 x 1 in. round washer head tapping screw is made in the USA. That matters if you're on a government, school or federally funded job with domestic sourcing language in the spec.

The washer head has an integral flange, so it gives a wider bearing surface than a pan head without adding a loose washer. Use it when you're fastening something with an oversized or slotted hole (strut clips, straps, plates) and you need the head to bridge the opening. Pan head is the pick when the hole is sized to the screw and you want a lower profile. The JRWS9 is the round washer head version, #8 x 1 in.

They come in a jar, 100 screws. The jar is useful on a service van or a shop bench because it reseals and you can see the count; it's not a bulk bucket, so for a large rough-in you'd order multiple.