Metallics JRSDS2 8 x 15/8 in. Bugle Head Star Drive Deck Screws - Steel Yellow Zinc - Type 17 - Threads - Each

A T20 star bit. The JRSDS2 uses a star (flat six-lobe) recess, so a T20 Torx-style driver seats fully and keeps the bit from camming out when you are sinking the bugle head flush.

No. The JRSDS2 carries a Type 17 point, and the chip cavity at that auger point lets the screw drive without pre-drilling a pilot hole, including in denser woods. On hardwood near a board end you may still want to drill to avoid splitting, but the point is cut to self-start.

The JRSDS2 is plain steel with a yellow zinc dichromate finish, which is a light corrosion coating meant for general wood fastening and protected or intermittent exposure. For a fully weather exposed deck, or contact with modern ACQ/copper-based pressure treated lumber, specify a stainless or heavy polymer-coated deck screw instead. Use the yellow zinc version for interior framing, subfloor, furring, blocking and covered work.

The bugle head pulls itself flush into wood on its own, no counterboring. Head width runs 0.285 to 0.331 in. with a head height of 0.108 in., so the tapered underside draws into the surface fiber as it seats. On thin or veneered material, ease off the trigger at the end so you do not overdrive and blow through the face.

They come in a jar of 100 count, and 100 is the order minimum. Figure about 0.72 lbs per jar. Handy for a service truck or an MRO shelf where you want a sealed container rather than a loose bulk box.

The JRSDS2 record carries a compliance flag of C for both ARRA and Buy American, with country of origin China. On a federally funded project, a Chinese-origin fastener will not satisfy a domestic-source clause, so confirm the exact wording on your spec before you put these on a government or institutional submittal.

For wood backing and blocking, yes, and the deck screw is the better choice. The deeper thread form on the RSDS series resists pull-out better than a drywall screw, and the 9 TPI coarse UNC thread grips framing lumber. What it is not is a structural fastener: for rated hanging loads or anything engineered, use a listed structural screw or through-bolt.

The JRSDS2 is made to AISI 1018-1022 low carbon steel, case hardened wire of the type standard for self-drilling wood screws. The star recess is what protects you with an impact driver: a T20 six-lobe bit transfers torque through the sidewalls instead of a tapered cone, so it resists stripping better than a Phillips in the same diameter.

Yes, the RSDS bugle head star drive Type 17 deck screw line is offered in other sizes and quantities by request. Note too that deck screw dimensions have no single industry standard, so the published head and length figures are a guide and slight deviations between lots are normal.