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Buna-N O-Ring 4.306" ID x 8.449" OD x 0.252" CS

Expert Overview

This industrial O-ring, crafted from durable Buna-N (Polycarbonate), provides exceptional sealing capabilities. With precise dimensions, it ensures reliable performance in critical fluid and gas containment systems across various industries.

StandardASTM A106
MaterialPolycarbonate
FinishPassivated
GradeN/A
Inside Diameter4.306"
Outside Diameter8.449"
Cross Section0.252"

Detailed Engineering Specifications

Specified by design engineers worldwide, this Buna-N O-ring is manufactured to meet stringent industrial standards. Featuring an inside diameter of 4.306 inches, an outside diameter of 8.449 inches, and a cross-section of 0.252 inches, it offers a precise fit for its intended housing. The Polycarbonate material composition of this Buna-N compound provides excellent resistance to oils, fuels, and hydraulic fluids, making it suitable for high-pressure and moderate-temperature applications in automotive, manufacturing, and hydraulic systems.

🧊 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. Inspect the mating groove and sealing surfaces for cleanliness and damage. 2. Lightly lubricate the O-ring with a compatible lubricant to facilitate installation and prevent tearing. 3. Carefully install the O-ring into the designated groove, ensuring it is seated evenly and without twists.

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
Overtightening during installation, causing extrusion or damage.Apply adequate but not excessive force during installation, ensuring the O-ring is properly seated without distortion.
Using incorrect lubricant that degrades the Buna-N material.Always use a lubricant specifically recommended for Buna-N (Nitrile) compounds and the operating environment.

Common Applications

  • Hydraulic cylinder seals
  • Fuel system components
  • Automotive engine seals
  • Industrial pump seals
  • Pneumatic systems

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, ketones, esters, or chlorinated hydrocarbons.
  • Operating temperature range should not exceed the material's recommended limits.

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 cylinder seals, Fuel system components, Automotive engine seals, Industrial pump seals, Pneumatic systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.306"CS = 0.252"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.