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

Buna-N O-Ring | 8.269" ID x 5.399" OD | Polycarbonate - Sealing

Expert Overview

This industrial-grade Buna-N O-ring, constructed from durable Polycarbonate, offers superior sealing capabilities. Its precise dimensions ensure a tight fit, preventing leaks in critical applications.

StandardASTM A106
MaterialPolycarbonate
FinishBlack Oxide
GradeN/A
Inside Diameter8.269"
Outside Diameter5.399"
Cross Section0.104"

Detailed Engineering Specifications

Engineered for reliability and performance, this Polycarbonate O-ring features an inside diameter of 8.269 inches, an outside diameter of 5.399 inches, and a cross-section of 0.104 inches. The Buna-N material is renowned for its excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for a wide range of demanding industrial applications. Its robust chemical compatibility and resilience under moderate temperatures contribute to long service life and consistent sealing integrity, even in challenging operational conditions. This O-ring is designed to maintain its form and function under pressure, ensuring a secure and leak-free seal.

🧊 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, dry, and free of debris. 2. Carefully install the O-ring into the designated groove, avoiding any stretching or twisting. 3. Verify proper seating and compression of the O-ring before assembling the components.

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
Installing a stretched or twisted O-ring.Handle the O-ring with care, ensuring it sits flat and without distortion in the groove.
Using excessive force during installation, potentially damaging the O-ring.Apply gentle, even pressure during installation, using appropriate tools if necessary to avoid pinching or cutting.
Installing into a dirty or damaged groove.Thoroughly inspect and clean the groove before installation; repair or replace if damaged.

Common Applications

  • Hydraulic Systems
  • Pneumatic Systems
  • Fluid Power Applications
  • Oil and Gas Equipment

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents.
  • Avoid prolonged exposure to UV light and ozone, which can degrade Buna-N.
  • Ensure compatibility with the specific fluid and operating temperature.

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 Systems, Pneumatic Systems, Fluid Power Applications, Oil and Gas Equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.269"CS = 0.104"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.