Metallics JRDS1V 8 x 1-1/4 in. Bugle Head Square Drive Deck Screws - All-Weather - Type 17 - Coarse Threads - Each

These are square drive, and the recess takes a #2 driver. A power bit ships with the screws, so you don't have to source one separately. The recess measures 0.110 to 0.113 inch wide and 0.064 to 0.075 inch deep, which is what keeps a square bit seated under a drill driver without camming out.

They carry an all-weather green ceramic coating over zinc that is intended to withstand a 500 hour salt-spray test, so exterior and damp-location work is what they're built for. That salt-spray figure is a corrosion test rating, not a service-life guarantee for direct saltwater immersion.

No on both counts. The JRDS1V 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 won't satisfy it.

The bugle profile is self-countersinking in wood, drawing itself flush as it seats, so no separate countersink step in softwood or decking. The head runs 0.315 to 0.363 inch across with a head height of 0.020 to 0.039 inch, so it's a low, wide bearing surface that won't tear through thin trim stock. In hardwood or any sheet metal, pre-drill and countersink.

They're packed in a jar and sold in a 500 piece quantity, with 500 each as the order minimum. Shipping weight on the jar is 2.28 lbs. Other sizes and quantities are available by request.

Coarse UNC threads, running 8 to 10 threads per inch. Coarse pitch is what you want in wood and composite decking because the deeper thread grabs soft fiber and pulls the joint tight in fewer turns. For sheet metal or thin gauge steel you'd want a self-drilling screw with a fine thread instead.

Metallics lists this RDS series screw for the electrical, plumbing, heating and air conditioning trades, and that's exactly where it earns its keep: coated for damp and exterior runs, Type 17 point so a tech can drive it into blocking or strapping off a ladder without pre-drilling, and a bugle head that sits flush under a strap or a device plate. Mounting condenser pads, strut backing, exterior disconnect blocking, and conduit standoffs are typical uses.

The screws are made to AISI 1080, a high carbon steel. Heat treated carbon steel is what gives a deck screw the torsional strength to drive without stripping the recess, but it also means they are harder and less ductile than a stainless fastener, so don't over-torque into dense hardwood or try to drive them into steel.