O" Ring-Buna N

O" Ring-Buna N

This is an AS568-142 standard O-Ring, a common size used for sealing applications in various concrete mixer systems. It is manufactured from Buna-N (Nitrile) rubber with a 70A durometer hardness, offering excellent resistance to petroleum-based oils, fuels, and many hydraulic fluids. This O-ring is a crucial replacement part for preventing leaks in both static and dynamic applications during routine maintenance or repair of equipment from brands like McNeilus, Terex, and Con-Tech. Its balance of durability and flexibility ensures a reliable seal under pressure.

Key Features

• Made from Buna-N (Nitrile) rubber for excellent resistance to petroleum-based oils and fuels.
• 70A durometer hardness provides a good balance of flexibility and durability for effective sealing.
• Standard AS568-142 size for broad compatibility.
• Effective sealing for both static and dynamic applications.
• Temperature range from approximately -40°F to +250°F.

Fits These Mixers

McNeilus, Terex, Con-Tech. This is a general-use O-Ring conforming to the AS568-142 standard size, making it suitable for various hydraulic and sealing applications across McNeilus, Terex, and Con-Tech concrete mixer equipment. It is a direct cross-reference for McNeilus part number 140-E-322.

All measurements ± standard manufacturing tolerance.

Product descriptions are drafted with automated tools and reviewed as time allows. While we work to keep them accurate, specifications and fitment should be confirmed with a Customer Service specialist at 800-745-3414 before purchase. Found an error? Let us know and we’ll fix it.