Metallics JFWP24SS 8 x 3 in. Flat Head Phillips Wood Screws - 18-8 Stainless - Each

They are 18-8 stainless, the common austenitic grade used where plain or zinc-plated steel would rust, so they hold up in damp and exterior conditions and will not stain cedar or redwood the way plated screws can. 18-8 is not the grade to pick for direct salt spray or submerged marine work. Stainless wood screws like these ship without any added finish or coating.

Roughly two thirds of the length. Metallics lists thread length as 2/3 of the screw for lengths over 1 inch, so on the 3 inch JFWP24SS expect about 2 inches of thread at 15 threads per inch with a plain shank under the head. That matters when you are through-fastening: a smooth shank through the top piece lets the thread pull the joint tight instead of jacking it apart.

No. The JFWP24SS is sourced from multiple countries of origin and is listed as neither Buy American compliant nor ARRA compliant. For a job with domestic-sourcing language in the contract, you need a fastener carrying a documented domestic origin instead.

Yes. The JFWP24SS is built to ASME B18.6.1 for dimensions and ASME B18.6.1-1997 for threads, which is the standard a drawing or submittal will cite for inch-series wood screws. Head, recess, and thread dimensions all fall inside those limits.

The threading rule differs by length. On nominal lengths too short to carry the minimum thread length, Metallics runs the threads as close to the underside of the head as practical. The 3 inch JFWP24SS is long enough to use the standard 2/3 thread with a plain shank, so do not expect full-length thread on this one.

They come in a jar of 100, and 100 is the minimum order quantity. The packed jar weighs 1.34 lbs. Handy for a van or a shop drawer rather than a bulk box.

Metallics targets the JFWP series at the electrical, plumbing, heating, and air conditioning trades. In practice that is mounting boxes, straps, brackets, and equipment to wood framing or blocking where corrosion is a concern, such as crawlspaces, mechanical rooms, and exterior walls. At 3 inches it has the reach to pass through finish material and still get solid purchase in a stud.