Metallics DWSR5M 6 x 2 in. Bugle Head Square Drywall Screws - Steel Black Phosphate - Coarse Threads - Each

A #1 square (Robertson) bit. The recess runs 0.090 to 0.106 inch wide and 0.055 to 0.071 inch deep, so a #2 square bit will not seat. Square drive is the reason to pick these over Phillips: the bit stays put and cams out far less when you are hanging board overhead.

No. Black phosphate is a dry interior finish only; it offers very little corrosion protection, so it will bleed rust through joint compound or paint in a wet or exterior location. The DWSR5M is a steel screw with a black phosphate finish, which is standard for interior drywall hanging. For exterior sheathing, wet rooms, or treated lumber, use a coated deck or exterior screw instead.

No. The DWSR5M is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your contract carries a domestic-sourcing clause, these will not qualify and you will need a domestically manufactured drywall screw.

These ship in jars of 1,000, and 1,000 is the order minimum, so a jar is the smallest buy. A full jar runs about 5.59 lbs. If you need other sizes or pack quantities in the DWSR series, Metallics offers them by request.

That is what the bugle head is for. The head measures 0.315 to 0.347 inch across with a head height of only 0.020 to 0.031 inch, so the tapered underside compresses the face paper rather than cutting it and the screw dimples just below the surface for mud. Set your driver clutch or depth-sensitive nose so the head stops a hair below flush.

They are made from AISI 1018 steel, case hardened to Rockwell C45-64. That hardness lets the sharp point bite and the threads cut without stripping, but hardened drywall screws are brittle in shear and are not structural fasteners. In dense or dry hardwood framing, drive at moderate speed and do not use them to carry load, hang cabinets, or substitute for a structural wood screw.

Roughly 8 to 10 threads per inch, UNC coarse spacing. That wide pitch is what pulls board tight to wood framing in fewer turns and gives the screw holding power in soft spruce or fir. Fine thread drywall screws run a much tighter pitch and are the wrong choice in wood.

Not exactly. There is no single industry standard for bugle head or drywall screw dimensions, so the published head and recess figures are a guide and slight deviations between lots or brands are normal. In practice the #1 square recess and the 0.315 to 0.347 inch head mean these interchange fine with other #6 square drive drywall screws on the same wall, and your existing driver bit will work.