UNSPSC 31411707: Oil seals

Oil seals, also referred to as shaft seals, are widely used to prevent the leakage of medium (such as oils and grease) along a rotating shaft. This leak prevention is primarily achieved by the sealing element which can be made from a wide range of materials that are chosen according to each application. They are commonly used in gearboxes, hydraulic cylinders, and related components. Oil seals are used to protect shafts and bearings from ingress of dirt and foreign matter and egress of oil or grease.

An oil seal generally consists of an outer circular metal part and an inner flexible member that does the actual sealing and is bonded to the metal part by chemical adhesive agents.

UNSPSC 31411707 Oil seals is a Commodity code under which state and local governments procure replacement sealing components for infrastructure maintenance, fleet operations, and facility asset management. The Maine Department of Transportation's RFQ 17A260427-275, posted May 18, 2026, exemplifies the work actually being solicited: the state is establishing a Master Agreement for bridge joint seals and related materials across 76 line items, including compression seals in 23 sizes, silicone coated foam seals, gland seals, and supporting materials such as lubricant adhesive, sealant, and backer rod, for delivery to nine MaineDOT locations throughout Maine. State transportation and public works departments drive the majority of identifiable recent activity under this code; the recent opportunities block contains one direct seal procurement (Maine DOT) against a broader set of fleet and facility maintenance solicitations that reference parts supply without specifically isolating sealing products.

Maine accounts for the only documented state-level seal-specific procurement in the recent opportunities block, with the RFQ due June 1, 2026, and a contract period running from June 15, 2026 through June 30, 2027 with four optional one-year extensions available. The Maine solicitation is structured as a single-award Master Agreement on a FOB Destination basis with pricing held firm for a minimum of one year. Interested bidders must submit completed Excel Bid Price Sheets via the State of Maine's Advantage Vendor Self Service electronic procurement system and provide manufacturer literature, equivalency documentation, warranty information, and a Responsible Bidder Form. The recent opportunities block shows no other state or local jurisdictions soliciting oil seals or comparable sealing products as a distinct procurement line, suggesting limited current visibility into demand across the broader state and local market under this specific code.