Metallics JDWC7C 8 x 2-1/2 in. Bugle Head Phillips Drywall Screws - Steel Black Phosphate - Coarse Threads - Each

Coarse thread is the right call for wood framing. The Metallics JDWC7C is a coarse-thread, sharp-point screw with a stated field application of wood to wood, drywall to wood and cabinet installations. Fine thread screws are what you reach for when you are fastening into metal studs. The sharp point starts without pre-drilling in wood.

Black phosphate is a dry interior coating. The JDWC7C is steel with a black phosphate finish, which gives mild corrosion resistance and a surface that holds joint compound, not weather protection. For exterior framing, wet rooms, or anything in contact with treated lumber, use a coated exterior deck screw or a galvanized fastener instead.

No. The JDWC7C 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 fastener will not qualify.

A #2 Phillips. The recess on these screws runs 0.176 to 0.201 inch in diameter with a 0.124 inch depth, which is what a standard #2 driver seats into. Using a #1 will cam out and chew the recess.

The bugle profile has a curved underside that compresses the paper face as it seats instead of cutting it, so the head sinks just below the surface and takes mud cleanly. On the JDWC7C the head measures 0.315 to 0.363 inch across with a head height of 0.020 to 0.039 inch. A flat head with a sharp shoulder tears the facing and leaves a weak fastening point.

Hardness is Rockwell C45-64, made from AISI 1018 steel. That is a case-hardened drywall screw: the shank stays stiff enough to drive without walking, but like all hardened drywall screws it is brittle in shear and should not be used as a structural fastener in place of a lag or a framing screw. Back off the clutch on the driver and let the depth setter stop the head.

Yes, that is a stated use. The field application for the JDWC7C covers the electrical, plumbing, heating and air conditioning trades alongside drywall and cabinet work, so it serves for fastening boxes, straps, and hangers into wood framing. It is not a substitute for a structural or masonry anchor.

They ship in a jar, with an order minimum of 100 per jar. Plan quantities in full jars rather than loose counts.

No single industry standard governs bugle head or drywall screw dimensions, so the figures Metallics publishes for the JDWC7C (head width, head height, recess depth) are a guide and slight deviations are normal. Thread is UNC at 8 to 10 threads per inch. If you are matching an existing fastener for appearance, order a jar and check before committing the whole job.