Metallics JRSDS3 8 x 1-3/4 in. Bugle Head Star Drive Deck Screws - Steel Yellow Zinc - Type 17 - Threads - Each

A T20 star bit. The JRSDS3 uses a flat six-lobe star recess, so a T20 Torx-style driver seats fully and cuts down on cam-out when you are running screws all day. Keep a spare bit on the cart; star bits wear at the tip before the screw fails.

No. The JRSDS3 has a Type 17 point, which is an auger tip with a chip cavity that clears material as it goes, so it drives without a pilot hole even in denser woods. Near board ends or edges, a pilot is still the smart move to avoid splitting.

Yellow zinc dichromate over steel is a coated-steel finish, not stainless. It handles general exterior and covered applications, but modern pressure-treated lumber and any coastal or constantly wet exposure are hard on zinc coatings. For ACQ-treated framing, salt air, or permanently damp conditions, specify a stainless or heavy polymer-coated deck screw instead. The JRSDS3 is built on AISI 1018 to 1022 carbon steel.

The bugle head is made to self-countersink. Head width runs 0.285 to 0.331 in. with a head height of 0.108 in., and the tapered underside pulls itself flush into softwood decking without a separate countersink. In very dense hardwood, back off the driver clutch so you do not crush the fibers around the head.

The JRSDS3 ships as a 100-count jar, and 100 is the minimum order quantity. A full jar weighs 0.83 lbs. If you need a different count or a bulk pack, Metallics offers other quantities in the RSDS series by request.

The JRSDS3 is flagged compliant for both ARRA and Buy American in Metallics' product data, with country of origin listed as China. On a federally funded project where domestic-origin substantiation is required, procurement should pull the manufacturer's compliance documentation before it goes in a submittal package.

Pull-out resistance. The RSDS thread is cut deeper than a general wood screw thread, which is what keeps a deck board from working loose and cupping off the joist under foot traffic and seasonal movement. The JRSDS3 runs 9 threads per inch in a UNC form at a #8 diameter, which is the coarse pitch you want in wood rather than metal.

Nothing stops you from using them inside. A #8 x 1-3/4 bugle head with a Type 17 auger point drives into framing lumber without a pilot and countersinks itself, which suits subfloor, blocking, and rough interior fastening. For finish trim where you want a small hole to fill, a trim-head screw or finish nail is the better-looking choice, since the bugle head is 0.285 to 0.331 in. across.