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Beaver Island Parts Company

6V-6638 Hydraulic O-Ring - FKM Fluorocarbon Replacement Sealing Ring, Direct Cross-Reference for hydraulic cylinders and heavy equipment

6V-6638 Hydraulic O-Ring - FKM Fluorocarbon Replacement Sealing Ring, Direct Cross-Reference for hydraulic cylinders and heavy equipment

Regular price $87.99 USD
Regular price $101.19 USD Sale price $87.99 USD
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Chasing a leak and need the exact replacement to seal it for good? A worn or wrong o-ring lets fluid weep past the joint, drops pressure, and can damage the equipment around it.


This Beaver Island Parts Company replacement o-ring cross-references part 6V-6638, molded in durable 70A Fluorocarbon (FKM) for a lasting seal.


Full Compatibility: Cross-references part 6V-6638. A direct-fit replacement o-ring for hydraulic cylinders and heavy equipment.
Installation Note: Clean the groove, inspect the sealing surface, seat the new o-ring without twisting it, and lubricate before assembly.
Pro Tip: Apply Aqua Flex lubricant before installation to ease seating and extend seal life.

We are an American family-owned and operated small business committed to providing high-quality replacement parts and honest fitment information.

Note: all part numbers referenced are used solely to confirm compatibility and are the trademarks of their respective owners.

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