UNSPSC 31163203: Dowel pin

UNSPSC 31163203 Dowel pin is a Commodity code that in practice captures transit authority procurement of engine and drivetrain components—rings, pistons, and related assemblies—rather than fasteners aligned with the abstract code name. State and local governments buying under this code are transit authorities managing maintenance and repair of bus and rail fleets. The Dallas Area Rapid Transit Authority (DART) appears as the repeat buyer in recent solicitations, procuring replacement piston ring assemblies for vehicle powertrains through competitive purchase-order bidding on the Bonfire platform. Vendors must meet FOB Destination pricing (freight included), Net 30 payment terms, and strict delivery-schedule compliance; failure to meet delivery timelines constitutes grounds for rejection and default termination. All goods require commercial warranties certifying merchantable quality and compliance with specifications, and vendors must certify non-affiliation with designated foreign terrorist organizations and commit to not boycotting Israel.

Recent activity concentrates in Texas, specifically the Dallas County area through DART solicitations posted between January and February 2026. Representative opportunities include DART's Ring, Compression, High Pressure Piston procurement (Solicitation 2097610, IFB, due January 28, 2026), Ring, Oil High Pressure Piston in a three-piece set (Solicitation 2098137, IFB, due March 20, 2026), and Ring, Oil Low Pressure Piston in a three-piece set (Solicitation 2098136, IFB, due March 20, 2026). The source shows no explicit set-aside designations or disadvantaged-business restrictions on DART's posted opportunities, and specific award values are not disclosed in the public bidding materials. Bidders must register on Bonfire to access complete specifications and pricing tables.