UNSPSC 31161721: Spring nuts

UNSPSC 31161721 Spring nuts is a Commodity code covering elastic-stop nuts, hex nuts, and related spring fasteners procured by state and local transit authorities and municipal water utilities for maintenance, repair, and operational inventory. The Dallas Area Rapid Transit Authority (DART) is the dominant buyer under this code, having posted four separate fastener procurement opportunities since mid-January 2026, including elastic-stop nuts (1/4-28 zinc), M8 hex nuts with suspension springs, and Grade 8 nuts (9/16"-18). These are routine consumable purchases in small unit quantities (packages and boxes of 25–100 units) submitted through DART's BONFIRE platform with seven- to fourteen-day response windows. DART enforces strict delivery-schedule performance, requires FOB Destination pricing with freight included, Net 30 payment terms, and commercial warranty compliance. No set-asides or disadvantaged-business restrictions appear in the recent DART solicitations. The City of Lavonia, Georgia also appears in the dataset for a water treatment plant construction project (posted April 24, 2026, sealed bid due May 26, 2026), though the procurement summary conflates spring nuts with a large infrastructure construction scope that does not align with the code's fastener focus.

Recent activity concentrates in Texas, where DART has posted the majority of opportunities, with secondary activity in Georgia and California. The Riverside County, California RFB for miscellaneous Cla-Val parts (posted January 21, 2026, due February 13, 2026) represents industrial-components procurement but lacks specificity on whether spring nuts are included in the scope. The code shows active, recurring procurement from a single dominant buyer (DART) executing high-frequency, low-dollar consumable purchases with tight turnaround windows and strict logistical requirements. Opportunity volume suggests modest revenue potential per award but with opportunity for recurring purchase-order relationships if a vendor establishes reliable delivery compliance and pricing competitiveness on DART's platform.