Value Collection ZMSCNU6226-8 U Cup Seal Buna-n 5 Pc

Product Description

The VALUE COLLECTION ZMSCNU6226-8 is a U cup seal set used to create a dynamic, pressure-activated seal in hydraulic and pneumatic cylinders. The inner diameter measures 1/4 inch and the outer diameter measures 3/4 inch. Constructed from Buna-N (nitrile) elastomer, these seals resist petroleum-based oils, hydraulic fluids, and moderate fuel exposure. Each package contains 5 pieces. U cup seals are installed by hydraulic technicians and maintenance mechanics performing cylinder rebuilds, linear actuator service, and fluid-power system repairs.

These U cup seals are suited for use in single-acting and double-acting hydraulic cylinders as well as pneumatic actuators operating in industrial, agricultural, and mobile equipment applications. The Buna-N material performs reliably across a broad range of operating temperatures and is a standard choice for general-purpose fluid-power sealing where petroleum-fluid compatibility is required. They are well-suited to MRO and repair operations that require a consistent, ready-stock seal in this bore size.

Key Features

• 1/4 inch inside diameter for precise bore fitment in standard cylinder applications
• 3/4 inch outside diameter provides correct housing engagement
• Buna-N (nitrile) material offers strong resistance to petroleum oils and hydraulic fluids
• U cup profile delivers pressure-energized sealing in dynamic rod and piston applications
• Sold as a 5-piece set for stocking MRO inventory or completing multiple repairs

Compatibility

Designed as a standard U cup replacement seal for hydraulic and pneumatic cylinders with a 1/4 inch bore or rod diameter and a 3/4 inch gland outside diameter. Verify housing groove dimensions against manufacturer specifications before installation.

Installation Notes

U cup seals are typically installed by hydraulic technicians or industrial mechanics during cylinder disassembly and rebuild. Depressurize and lock out the hydraulic or pneumatic circuit completely before removing any cylinder components. Lubricate the seal lip lightly with clean system fluid before installation to avoid tearing the elastomer during assembly. Inspect the rod and bore surfaces for scoring or burrs that could damage the new seal.