UNSPSC 31161833: Bonded washer

A type of washer that acts like a simple pressure gasket providing leak-proof sealing from water, gases, oils and other fluids.

UNSPSC 31161833 Bonded washer is a Commodity code that captures fasteners and fastener components procured by state and local government agencies for maintenance, repair, and capital projects. Recent state and local opportunities under this code show procurement of standard bolts and washers used in transit, water infrastructure, and facility operations—the most recent being bolts solicited by the Dallas Area Rapid Transit Authority (DART) for inventory or fleet maintenance. Issuing bodies include regional transit authorities, municipal utilities, and city departments; DART appears as an active repeat buyer. The scope of work is narrow and tactical—procurement officers are buying off-the-shelf fasteners to specification (diameter, pitch, length, material grade) through streamlined purchasing processes rather than complex fabrication or engineering work.

DART's September 2026 IFB for 1/2"-13 X 2-3/4" bolts (due September 11, 2026) required FOB Destination terms with freight included, Net 30 payment, and submission via the BONFIRE platform. The City of Lavonia, Georgia water treatment plant project (sealed bid due May 26, 2026) included fastener and bonded washer requirements as subordinate line items within a larger water infrastructure upgrade, though the primary scope was civil construction. Texas and Georgia show recent activity. This code typically supports low-dollar, high-velocity purchasing; response windows are short (often under two weeks) and competitive bidding is standard. Vendors should expect tight delivery requirements and emphasis on specification compliance and shipping terms rather than design or technical proposal complexity.