UNSPSC 31161706: Captive nuts

UNSPSC 31161706 Captive nuts, a Commodity code, encompasses the supply of specialized fastening hardware — primarily elastic stop nuts, Grade 8 nuts, and hex fasteners — to state and local transit authorities and municipal utilities for maintenance, repair, and operational support. Recent activity shows state and local governments purchasing captive nuts as both standalone consumable supplies and as components embedded in larger infrastructure projects. The Dallas Area Rapid Transit Authority dominates recent procurement activity under this code, issuing multiple standalone purchase orders for elastic stop nuts (1/4-28 zinc-plated), 9/16"-18 Grade 8 nuts, and M8 hex stainless steel fasteners. These solicitations reflect routine transit maintenance and vehicle upkeep demand. Bidders responding to DART opportunities must register on the BONFIRE platform, submit quotes with FOB Destination shipping terms and freight included, and meet Net 30 payment terms with invoices in triplicate to APInvoices@dart.org. Delivery timeliness is contractually essential; failure to meet specified schedules triggers rejection and default termination. No set-aside designations or disadvantaged enterprise restrictions appear in DART's recent solicitations on this code.

Recent activity concentrates in Texas and California. DART in Dallas County, Texas posted four nuts and fastener procurements between January 21 and January 29, 2026, with response windows of seven to nine days (deadlines January 28 and February 5, 2026). Riverside County, California issued RFB3909 on January 21, 2026, for Cla-Val parts (due February 13, 2026), though that opportunity aligns loosely with captive nuts. A municipal water treatment plant project in Lavonia, Georgia (City of Lavonia, operating under Fayette County jurisdiction), solicited comprehensive construction services through sealed competitive bidding with an April 24, 2026 posting and May 26, 2026 deadline; while that project encompasses far broader scope, captive nuts may be component items within the filtration and chemical feed system renovations. The issuing-body mix spans transit authorities as primary repeat buyers and municipal utilities as occasional purchasers when infrastructure work incorporates fastening hardware.