Metallics JSDS1C 6 x 1 in. Bugle Head Phillips Drywall Screws - Steel Zinc - Fine Threads - Each

Fine thread is the metal stud screw. The JSDS1C is an 18 threads-per-inch UNF fine thread with a drill point, so it self-drills and self-taps into light gauge steel framing without a pilot hole. Coarse thread screws are the ones meant for wood studs. Metallics lists this screw for wood, drywall, steel and aluminum work, but on wood framing a coarse thread holds better.

No. The JSDS1C is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your contract carries a domestic sourcing clause, specify a compliant fastener instead.

A #2 Phillips. The recess is 0.106 in. deep with a 0.176 to 0.201 in. diameter, which is standard #2 geometry, so a worn bit is the usual cause of cam-out on a #6 drywall screw.

The JSDS1C ships in a jar, with a 100-piece minimum order. Jar weight is listed at 0.39 lbs.

That is what the bugle head does. The head measures 0.315 to 0.347 in. across with a head height of only 0.020 to 0.031 in., so the tapered underside compresses the paper and dimples the board rather than cutting through it, leaving a shallow depression you can skim with compound.

Treat them as interior fasteners. The screw is AISI 1018 steel with a zinc finish, which is a plating for handling and dry interior service, not a coating rated for exterior exposure or wet areas. For outside work or persistently damp locations, use a fastener with a corrosion rated coating or stainless.

They are case hardened to Rockwell C44 with a drill point, which is what lets the tip cut light gauge steel and aluminum without a pilot. That hardness also makes them brittle in bending, so keep the driver square to the work and back off the clutch speed in thicker material rather than leaning on the gun.

Metallics lists it across electrical, plumbing, heating and air conditioning work as well as wood, drywall, steel and aluminum. In practice that means hanging light sheet metal, strut accessories, and panel work where the flat bugle head needs to sit near flush. Where the head must not protrude at all into a finished surface, pick a flat or trim head instead.

It belongs to the Metallics SDS and SDSB series of self-drilling and tapping drywall screws, and other sizes and quantities are available by request. The JSDS1C itself is the 6 x 1 in. fine thread, zinc, bugle head Phillips configuration.