Metallics DWC3B 6 x 1-1/4 in. Bugle Head Phillips Drywall Screws - Steel Black Phosphate - Coarse Threads - Each

Keep it inside. Black phosphate is a dry interior finish, not a corrosion coating for weather or wet service. The DWC3B is a steel screw with a black phosphate finish meant for interior board hanging, cabinet work, and the electrical, plumbing, and HVAC trades working inside the building. For exterior decks, soffits, or anywhere it sees water, use a coated exterior or deck screw instead.

No. The DWC3B is not Buy American compliant and is not ARRA compliant, and the country of origin is listed as multiple. If you are buying for a federal, state, or institutional project with domestic sourcing language in the spec, this part will not clear it and you need a domestically sourced fastener instead.

A #2 Phillips. The recess runs 0.176 to 0.201 inch across and 0.106 inch deep, which is standard #2 geometry, so any decent #2 insert bit or a #2 on a screw gun collated driver seats properly. Three power bits ship in the box, so a crew is not hunting for one on day one.

That is exactly what the bugle profile is for. The head flares out to 0.315 to 0.347 inch wide but stands only 0.020 to 0.031 inch tall, so it dimples the paper and countersinks itself rather than cutting through it. Set your gun depth so the head just breaks the surface, and the recess takes mud clean with no proud head telegraphing through the finish.

They ship 8,000 each to a box, which is the order minimum on this part. That is a bulk pack sized for a framing or drywall crew running a whole building, not a service truck restock. The box weighs 29.99 lbs. Metallics builds this size in the JDWC and DWC series, and other sizes and quantities are available by request.

The DWC3B runs Rockwell C45-64 on AISI 1018 steel. That hardness is what lets the point start without a pilot and keeps the recess from camming out under a screw gun, but hardened drywall screws are brittle in shear by nature. Use them to hang board and trim out interior work, not to hang anything structural or carry load in shear, where a lag or structural screw belongs.

Both. Metallics lists the DWC3B for drywall to wood, wood to wood, and cabinet installations, and calls out the electrical, plumbing, and HVAC trades, which is why it turns up on strap, box, and hanger work as much as on board. The coarse thread and sharp point do the same job in either case: bite wood without a pilot hole. Just remember the bugle head sinks itself, so it is not the fastener for anything you need to sit flat on a metal surface.

Thread count runs 8 to 10 per inch, a UNC coarse pitch with wide, deep flights. That spacing plus the sharp point means no pilot hole in softwood framing or in board. The wide pitch is also why it pulls in fast and holds in wood, and why it is the wrong choice in steel, where a fine thread is needed.