Metallics RSDS4B 8 x 2 in. Bugle Head Star Drive Deck Screws - Steel Yellow Zinc - Type 17 - Threads - Each

No. These carry a Type 17 point, which is the auger/chip-cavity tip that cuts its own path and clears waste as it goes, so it drives without a pilot hole even in denser woods. On brittle hardwood trim or near a board end you may still want a pilot to keep from splitting, but for standard decking and framing work it goes straight in.

Yes. At 2 inches overall length, a 5/4 deck board (about 1 inch actual) leaves roughly an inch of thread biting into the joist, which is the normal hold for surface-screwed decking. Going through a full 2x (1-1/2 inch actual) board only leaves about 1/2 inch in the framing, so step up to a longer screw for that.

Yellow zinc dichromate is a light-duty coating. It handles covered, dry, or interior work fine, but it is not a hot-dip galvanized or stainless coating, so for a fully weather-exposed deck or direct contact with modern pressure treated lumber, specify a fastener rated for that exposure instead. Use the RSDS4B where the connection stays protected: subfloor, interior framing, sheathing, blocking, backer for equipment mounting.

A T20 star bit. The RSDS4B uses a flat six-lobe (star) recess, so a T20 driver seats fully and keeps the bit from camming out when you're running long screws into dense material. Bring more than one bit if you're working through a full box.

It will. The bugle head on the RSDS4B has a curved underside that pulls itself into wood and self-countersinks, so you get a flush or slightly dished finish with no separate countersink step. The head measures 0.285 to 0.331 in. across and 0.108 in. tall, so the footprint left on the board face is small.

They ship 1,750 to a box, which is the order minimum. That is a bulk production quantity rather than a contractor pack, so it suits a crew running deck boards, subfloor, or repeated blocking across a job or a property portfolio. Boxed weight is 15.23 lbs.

The RSDS4B is flagged compliant for both Buy American and ARRA, which is what a public-sector, school, or federally funded project spec usually asks for on fasteners. Country of origin is listed as multiple.

Nine threads per inch in a UNC coarse form. That coarse, deep thread is what a deck screw wants in wood: fewer, taller threads grab more fiber per turn and resist pull-out, and they are far less likely to strip a hole in pine or fir than a fine pitch would be. Don't overdrive it, once the bugle head seats, stop.

AISI 1018 to 1022 low carbon steel, zinc plated with a yellow dichromate finish. That is the standard mild steel grade for driven wood fasteners, hard enough to carry the Type 17 point through dense stock without the brittleness you get from a hardened-through screw snapping in the hole.