Earl's Performance Buna-N Nitrile O-Rings

Earl's Performance Buna-N O-Rings deliver dependable, leak-free sealing for automotive, marine, and powersports fluid systems. Manufactured from Buna-N (Nitrile Butadiene Rubber / NBR) — the industry-standard elastomer for fluid system sealing — these O-rings are engineered to meet the demanding requirements of high-performance vehicles and equipment. Earl's Performance has been a trusted name in fluid system components since 1955, bringing the same commitment to precision and quality found across their complete hose, fitting, and adapter lineup to every O-ring in this series.

Key Features:

• Buna-N (Nitrile / NBR) Construction — The most widely used O-ring elastomer, offering proven resistance to petroleum-based oils, fuels, hydraulic fluids, and lubricants
• High-Temperature Performance — Rated up to 275°F, maintaining sealing integrity in thermally demanding environments
• Outstanding Mechanical Properties — Excellent tensile strength combined with strong resistance to abrasion, wear, and pressure deformation
• Broad Chemical Compatibility — Compatible with most fuels, hydraulic fluids, lubricants, and mineral oils commonly found in performance applications
• Precision Manufactured — Consistent dimensional accuracy and material quality built to Earl's Performance standards
• Versatile Application — Suitable for fuel systems, hydraulic lines, oil systems, power steering, and general fluid transfer connections
• Made in USA — Designed to meet or exceed factory standards with guaranteed Earl's craftsmanship

Buna-N nitrile rubber is the preferred elastomer for O-ring seals in performance automotive and marine environments due to its outstanding resistance to petroleum-based fluids and its ability to maintain elasticity and sealing force across repeated use cycles. Nitrile's strong mechanical properties — including high tensile strength and excellent abrasion resistance — make it equally well-suited for both static sealing and dynamic applications such as rotary and reciprocating shaft seals.

Whether used as replacement seals in existing AN fittings and adapters or as components in a new performance build, Earl's Performance Buna-N O-Rings are a trusted choice for builders and technicians who demand reliability in every fluid connection. This product line is available in multiple sizes to suit a wide range of fitting, port, and adapter applications — select the correct variant for your specific use.