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, a Commodity code, encompasses mechanical sealing components that state and local governments procure primarily for infrastructure maintenance, equipment repair, and fleet management applications. Based on recent solicitations, the code covers compression seals, silicone-coated foam seals, and gland seals used in bridge joint applications, as well as repair parts and related seal materials for specialized equipment such as Moyno pumps. State and local buyers under this code include state departments of transportation, city public works and finance departments, and county purchasing offices. The Maine Department of Transportation, the City of Port Orange (Florida), and county purchasing departments appear as active solicitors, though the activity pool is limited and geographically dispersed.

The most recent substantial opportunity is the Maine Department of Transportation's RFQ for bridge joint seals and related materials, posted May 18, 2026, with a June 1, 2026 deadline. The solicitation encompasses 76 line items including compression seals in 23 sizes (1/2" to 6"), silicone-coated foam seals, non-brand-specific gland seals, and supporting materials such as adhesive, sealant, primer, and backer rod, with delivery required to nine MaineDOT locations across five regions. The initial contract period runs June 15, 2026 through June 30, 2027, with four optional one-year extensions through June 30, 2031. The City of Port Orange issued a Notice of Intent to Award a sole-source procurement in September 2026 for NOV Chemineer Moyno pump products and repair services (estimated $500,000 annual value), though this notice sought verification of alternative sources rather than competitive bidding. Beyond Maine and Florida, the source does not support sufficient recent activity to characterize geographic concentration; no other state or local opportunities under the code appear in the recent record.