Home > Sealing > Industrial O-Ring, Buna-N

Buna-N O-Ring 8.589" ID x 2.687" OD x 0.262" CS

Expert Overview

This robust industrial O-ring, crafted from durable Buna-N, ensures reliable sealing in challenging environments. Its precise dimensions and material properties make it ideal for critical fluid and gas containment systems.

StandardASTM A106
MaterialPolycarbonate
FinishPlain
GradeN/A
Inside Diameter8.589"
Outside Diameter2.687"
Cross Section0.262"

Detailed Engineering Specifications

Manufactured under strict quality controls, this Buna-N O-ring features a precise inside diameter of 8.589 inches, an outside diameter of 2.687 inches, and a cross-section of 0.262 inches. Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to petroleum-based oils, hydraulic fluids, water, and many dilute acids. Its broad operating temperature range and superior abrasion resistance make it suitable for dynamic and static sealing applications in hydraulics, pneumatics, automotive, and general industrial machinery.

🧊 Download 3D CAD Model (.STEP)

Verified Global OEM Partners

This component strictly adheres to the tolerances, material specifications, and quality benchmarks set by the world's leading industrial manufacturers.

TrelleborgEst. 1905
Sweden🇸🇪
"Engineered polymer solutions."
Market Rank
🏆 #1 Engineered Polymers
Industry Approvals
🚀 Aerospace & Subsea Approved
Warranty & Support
🛡️ High-Performance Guarantee
Green Manufacturing
🌱 Blue Dimension ESG
Certified:ISO 9001, ISO 14001
GarlockEst. 1887
USA🇺🇸
"High-performance fluid sealing."
Market Rank
🏆 Premium Fluid Sealing Leader
Industry Approvals
🚀 Nuclear & Pharma Approved
Warranty & Support
🛡️ Zero-Leak Guarantee
Green Manufacturing
🌱 Sustainable Materials
Certified:ISO 9001, FDA, NSF
FreudenbergEst. 1849
Germany🇩🇪
"Global sealing technologies."
Market Rank
🏆 Top Global Sealing Tech
Industry Approvals
🚀 Audi & Mercedes OEM
Warranty & Support
🛡️ Global Engineering Support
Green Manufacturing
🌱 Climate Neutral 2045
Certified:IATF 16949, ISO 14001

Certifications & Compliance

RoHS Compliant:Yes
REACH Compliant:Yes
Material Traceability:Available on Request
DFARS Compliant:N/A

Installation Procedure

1. Ensure the mating groove is clean, free from debris, and properly machined. 2. Lightly lubricate the O-ring and groove with a compatible lubricant. 3. Carefully install the O-ring into the groove, avoiding stretching or twisting.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

Mechanical Properties

Tensile StrengthStandard Commercial Spec
Yield StrengthStandard Commercial Spec
HardnessVaries by specific batch

Temperature & Environment Rating

Min Operating Temp
-20°F (-29°C)
Max Continuous Temp
400°F (204°C)
Thermal Expansion
Typical for Material Class

Weight Reference Table

Size / TypeEst. Weight (lbs/100)Shipping Weight (kg)
StandardVaries by dimensionContact Sales

Corrosion Resistance Guide

EnvironmentRating
Indoor / DryExcellent
Outdoor / ExposedModerate
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using the wrong lubricant, which can degrade the Buna-N material.Always use a lubricant specifically recommended for Buna-N and the application's fluid.
Over-stretching or twisting the O-ring during installation, leading to premature failure.Install the O-ring smoothly without excessive force or deformation.

Common Applications

  • Hydraulic cylinders
  • Pneumatic systems
  • Fuel and oil lines
  • Automotive seals
  • General industrial machinery

⚠️ Engineering Warnings

  • Not recommended for use with ketones, esters, or high-polarity solvents.
  • Exposure to ozone, UV light, or weathering may degrade material over time. Consider alternative materials for outdoor or high-ozone environments.

Alternative Products to Consider

Premium Sealing equivalentHigher corrosion resistance (316 SS)
Economy Sealing optionLower cost for non-critical indoor applications

Frequently Asked Questions

Q: What is the Industrial O-Ring, Buna-N made from?

A: This Industrial O-Ring, Buna-N is manufactured from Polycarbonate.

Q: What are the main applications?

A: Hydraulic cylinders, Pneumatic systems, Fuel and oil lines, Automotive seals, General industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.589"CS = 0.262"SPECIFICATIONSSize: -214

Torque Specifications

⚡ UNIT CONVERTER

Conversion factor: 1 ft-lb ≈ 1.356 Nm

Verified Compatibility

StatusMating ComponentStandardTorque SpecEngineering Notes
No verified compatibility data found for this component.