UNSPSC 31163305: Anti-loosening device

Fastening device that prevents loosening of bolts and nuts due to vibration and external force

UNSPSC 31163305 Anti-loosening device (Commodity) appears in state and local procurement activity primarily as a line item or component within broader Maintenance, Repair, and Operations (MRO) supply and industrial fasteners solicitations rather than as a standalone procurement category. The code captures fastening hardware—including threaded fasteners, bolts, nuts, washers, lock devices, and related binding components—that state and local agencies source as part of comprehensive maintenance inventories, fleet repair programs, and facilities upkeep. Recent solicitations show the work is driven by municipal and county facilities maintenance operations, water utilities, transportation authorities, and school district operations requiring standardized fastener inventory for preventive maintenance, equipment repair, and ongoing asset management across multiple locations and building systems.

State and local issuing bodies soliciting under this code include the City of Tucson (Arizona), Orange County Transportation Authority (California), City of Dallas (Texas), and Collin County Community College District (Texas), reflecting mixed municipal, county, special-purpose, and community college purchasing activity. The City of Tucson's RFP 240078 for MRO supplies (response due March 28, 2024) established a three-year master agreement covering over 1,995 line items across 25 product categories including electrical, plumbing, and fleet maintenance supplies with nationwide cooperative purchasing through OMNIA Partners; the Orange County Transportation Authority's IFB 250199 for threaded products and fasteners (response due March 16, 2026) specified 154 line items of Grade 8 high-strength fasteners with a $150,000 estimated value over three years and DBE set-asides; and the City of Dallas's solicitation (response due June 25, 2026) requested fastening, packaging, strapping, and tying equipment and supplies for the Water/Material Services Division. Activity concentrates in Texas, Arizona, and California, with additional procurement events in Florida and across the broader OMNIA Partners cooperative network. No single dominant issuing body emerges; instead, purchasing is distributed across municipalities, transportation authorities, and community colleges managing distributed asset bases and recurring maintenance schedules.