Metallics WDW3M 8 x 1 in. Wafer Head Phillips Sharp Point Drywall Screws - Steel Zinc - Each

The WDW3M wafer head screw ships in a box of 1,000 pieces, and 1,000 is the order minimum. If you need a different size or count, Metallics notes other sizes and quantities are available by request.

The WDW3M is a self-piercing and tapping sharp point screw. The sharp point pierces and taps its own thread in light gauge material, so it works in drywall over light steel framing without a pilot hole. For heavier gauge steel, step up to a self-drilling (point type) screw instead, since a sharp point will walk and spin out on thick stock.

The wafer head on the WDW3M sits low and spreads load over a large bearing surface, measuring 0.426 to 0.446 inches across with a head height of 0.082 to 0.098 inches. That low profile is what you want when you are clamping something thin, like strap, conduit clips, or sheet material, against the surface without the head burying itself the way a bugle head does in paper face drywall.

No. The WDW3M is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic sourcing clause, this screw will not satisfy it.

Phillips drive, #2 bit size. A free power bit is included with the box, so you are not buying one separately to start the job.

The WDW3M is made from AISI 1018 to 1022 steel case hardened to Rockwell C28-38 and rated to a minimum torsional strength of 45 Kg/cm. That is enough to take a standard drywall gun without the shank twisting off, provided you run a sound #2 Phillips bit and let the depth clutch set the head.

The WDW3M is steel with a zinc finish. Zinc plating is an indoor corrosion coating, so keep these to dry interior work. For exterior, wet, or treated lumber applications choose a fastener with a coating rated for outdoor exposure.

At 1 inch of length in a #8 diameter, the WDW3M leaves roughly half an inch of thread past 1/2 inch board, which is adequate purchase in light framing or where you are pinning a bracket flat to the surface. Through 5/8 inch board you have less engagement, so step to a longer screw for anything carrying load.

Metallics lists this screw for the electrical, plumbing, heating and air conditioning trades. In practice that means hanging strap, mounting boxes and brackets, and fastening light sheet and board where a low profile head is needed.

A box of 1,000 weighs 5.59 lbs, with box measurements of 7.25 x 4.5 x 4.5 inches. Useful if you are staging multiple boxes on a cart or working out freight on a bulk order.

Treat them as a guide. Metallics states there is no single standard for self-piercing screw dimensions, so the head width and height figures are nominal ranges and small deviations can occur between production runs. If a bracket slot or clearance hole is tight, verify against a sample before committing to a bulk order.