Metallics JRSDS5 9 x 2-1/2 in. Bugle Head Star Drive Deck Screws - Steel Yellow Zinc - Type 17 - Threads - Each

A T25 bit. The JRSDS5 uses a star (flat six-lobe) recess, so a T25 star/Torx driver seats fully and keeps cam-out down when you are sinking the bugle head flush. Keep spares on the truck if you are running a full jar of 100.

No. The JRSDS5 has a Type 17 point, the chip cavity or auger point that lets the fastener drive especially in denser woods without pre-drilling a pilot hole. In very dry hardwood or close to a board end you may still want a pilot to avoid splitting.

The JRSDS5 is steel with a yellow zinc dichromate finish, which is a sacrificial coating suited to general exterior wood fastening. It is a coated carbon steel screw, not stainless, so for coastal exposure, submerged conditions, or direct contact with ACQ-type treated lumber in wet service, a stainless or heavier polymer-coated deck screw is the safer call.

Yes. The bugle head on the JRSDS5 measures 0.316 to 0.358 in. across with a head height of 0.124 in., and the flared underside pulls itself flush into softwood decking as you drive it. In hardwood, ease off the trigger at the end so you do not mushroom the surface fibers.

They ship in a jar of 100, and 100 count is the order minimum. Figure roughly two screws per joist crossing on a deck board when you are working out how many jars the job needs.

The JRSDS5 carries both an ARRA compliant and a Buy American compliant designation in its product record, with country of origin listed as China. For a federally funded job, submit those designations with your package so the specifying authority can confirm they satisfy the particular clause on your contract.

Cam-out. The six-lobe star recess on the JRSDS5 lets the T25 bit transfer torque without climbing out of the head, which matters when you are driving a Type 17 point into dense or treated lumber with no pilot hole. Phillips heads strip under that load and leave you digging out half-sunk screws.

The RSDS deck screw uses a deeper thread form specifically for greater resistance to pull-out forces, which helps on treads and board fastening. They are wood deck screws, though, not structural connectors, so anything carrying a code-rated structural load (ledger attachment, post-to-beam) needs a rated structural screw or bolt instead.

AISI 1018 to 1022 low-carbon steel, finished in yellow zinc dichromate. That is the standard material band for case-hardened wood screws, which is what gives the Type 17 point enough hardness to cut its own hole in dense lumber.