Metallics JSDS7C 8 x 25/8 in. Bugle Head Phillips Drywall Screws - Steel Zinc - Fine Threads - Each

No. The JSDS7C is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. On a federally funded job with domestic sourcing requirements, you'll need a different fastener.

A #2 Phillips bit. The bugle head uses a Phillips recess 0.176 to 0.201 inch in diameter and 0.124 inch deep, so a #2 seats fully; a #1 will cam out and strip the recess.

That's what the bugle head is for. The tapered head dimples the paper face instead of tearing it, and head height on these runs 0.020 to 0.039 inch with a head width of 0.315 to 0.363 inch, so it countersinks below the board surface and finishes under joint compound without a bump.

They are case hardened to Rockwell C44 and made from AISI 1018 steel, which is the hardness range that lets the drill point cut light gauge framing instead of rolling over. Driven at high speed into heavy gauge steel, any self-drilling drywall screw can still burn its point, so keep the RPM down and let it cut.

The JSDS7C is steel with a zinc finish, which is a plating for dry interior service. It gives handling and light humidity protection only, not weather exposure. For outdoor, wet, or treated lumber work, go to a coated or stainless exterior fastener instead.

Field application covers wood, drywall, steel and aluminum, and the screw is used across the electrical, plumbing, heating and air conditioning trades. The drill point plus fine thread is tuned to light steel, so that is where it performs best, but it is not limited to board work.

They ship in a jar, with a 100 piece minimum. Other sizes and quantities in the SDS and SDSB series are available by request.

There is no single industry standard for bugle head or drywall screw dimensions, so the figures are published as a guide and slight deviations between production lots are normal. That is why head width reads 0.315 to 0.363 inch rather than a fixed value. It does not affect how the screw sets in board, but if you are matching a spec that calls out an exact head diameter, treat these as nominal.