UNSPSC 31161733: T nut or T slot nut

A type of fastener in the shape of a T with a central threaded hole that is designed to fit around and secure a bolt or a screw leaving a flush surface.

UNSPSC 31161733 T nut or T slot nut is a Commodity code under which state and local governments procure fastening hardware — primarily standard nuts in various grades, sizes, and material specifications — for transit operations, facility maintenance, and infrastructure projects. Recent activity shows a split between small-volume consumable fastener purchases (elastic stop nuts, Grade 8 nuts, washers, hex fasteners) and occasional integration into larger construction or renovation projects where T-slot nuts appear as components within comprehensive facility upgrades. The Dallas Area Rapid Transit Authority (DART) is the dominant repeat buyer in the recent record, posting four separate fastener procurement notices between January 21 and January 29, 2026, each for small packages (25 to 100 units) of specific nut types and grades. Beyond DART, the code also appears in broader construction solicitations — the City of Lavonia, Georgia issued an IFB on April 24, 2026 for Water Treatment Plant 2026 Improvements, a nine-month infrastructure project increasing treatment capacity to 3.0 million gallons per day, and Riverside County, California issued an RFB on January 21, 2026 for miscellaneous Cla-Val parts inventory. Issuing bodies are mixed between transit authorities and municipal governments; the code does not show state-level procurement activity in the recent record.

Activity concentrates in Texas (DART accounts for four recent solicitations across January and February 2026) and California (Riverside County RFB posted January 21, 2026), with a secondary solicitation from Georgia (City of Lavonia, sealed bid due May 26, 2026). DART's fastener orders are straightforward consumable purchases with submission deadlines of 7 to 14 days; each requires FOB Destination pricing with freight included, Net 30 payment terms, and submission through BONFIRE. The City of Lavonia's Water Treatment Plant project, by contrast, is a sealed competitive bid with a pre-bid conference scheduled for May 7, 2026 and question submission deadline of May 12, 2026; the sealed bid deadline is May 26, 2026 at 10:00 AM at Lavonia City Hall. The project includes DBE participation goals of 4.0% for minority-owned and women-owned businesses, Davis-Bacon prevailing wage requirements, and BABA compliance mandating U.S.-origin iron, steel, and manufactured products. Riverside County's RFB for Cla-Val parts (due February 13, 2026) provides minimal detail and recommends contacting the county directly for specifications and award value.