3-7/8" ID X 4-3/8" OD X 1/4" HT

APG stocks the L25003875, a Polyurethane (AU/EU) Standard Profile Loaded Lip Seal built to a 3-7/8 inch inside diameter, a 4-3/8 inch outside diameter, and a height of 1/4 inch. A loaded lip seal uses a flexible sealing lip energized by system pressure to hold a tight seal on a moving rod or piston. Source specification: Loaded Lip Seal (standard) Urethane.

Polyurethane (AU/EU) is specified here for long wear life in dynamic reciprocating service and outstanding extrusion resistance at elevated pressure. The material holds up against ozone, petroleum oils, and abrasion and wear.

Maintenance and OEM teams specify it across construction machinery, hydraulic cylinders, and mining and heavy equipment.

Reference part number L25003875 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.