UNSPSC 31161729: Knurled nuts

UNSPSC 31161729 Knurled nuts is a Commodity code that state and local governments use to procure fastening hardware, predominantly elastic stop nuts, hex nuts in various grades and thread sizes, and related fastening components for transit operations, water infrastructure maintenance, and general municipal fleet and facility upkeep. The code sees activity across transit authorities and county governments, with the Dallas Area Rapid Transit Authority (DART) emerging as a repeat buyer posting multiple fastener procurements within recent weeks, including elastic stop nuts (1/4-28 zinc-plated) and Grade 8 nuts (9/16"-18), alongside related fastening supplies like washers and suspension springs for transit vehicle and system maintenance.

Recent procurement activity concentrates in Texas and California, driven by DART's January 2026 purchase order postings across multiple fastener specifications with response windows of one to three weeks. DART procurement notices require FOB Destination shipping with freight included, submission through the BONFIRE platform's BidTable system, Net 30 payment terms, and strict delivery schedules with termination-for-default language. A representative solicitation is DART's IFB for elastic stop nuts, 1/4-28 zinc-plated (item 2097736), posted January 29, 2026, with a response deadline of February 5, 2026, requiring registration and in-browser submission with triplicate invoice documentation to APInvoices@dart.org. Riverside County, California issued a Request for Bid (RFB3909) on January 21, 2026 for miscellaneous Cla-Val parts inventory with a February 13, 2026 deadline, indicating broader regional procurement activity in the fastener and mechanical component supply space. The City of Lavonia, Georgia's water treatment plant improvements project (posted April 24, 2026, sealed bid deadline May 26, 2026) represents large-scale municipal infrastructure work that may incorporate fastening hardware as a subordinate material component, though the procurement is coded to water construction rather than fastener supply itself.