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Buna-N O-Ring - Polycarbonate, 3.979" OD, 9.530" ID

Expert Overview

This industrial O-ring, constructed from robust Buna-N material with a polycarbonate composition, offers exceptional sealing integrity. Precisely engineered for critical applications, it ensures reliable performance under pressure.

StandardASTM A106
MaterialPolycarbonate
FinishPassivated
GradeN/A
Inside Diameter9.530"
Outside Diameter3.979"
Cross Section0.093"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N O-ring features a nominal inside diameter of 9.530 inches, an outside diameter of 3.979 inches, and a precise cross-section of 0.093 inches. The Buna-N (Nitrile) material provides excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for general-purpose sealing in automotive, hydraulic, and pneumatic systems. Its inherent elasticity ensures a tight seal against contaminants and leakage. The polycarbonate aspect of its construction, while unusual for a traditional O-ring, likely refers to a specific coating or composite formulation designed to enhance chemical resistance or operational temperature range within certain parameters.

🧊 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 and sealing surfaces are clean, free of debris, and dry. 2. Carefully lubricate the O-ring with a compatible lubricant if recommended for the application. 3. Gently install the O-ring into the groove, avoiding any stretching or twisting that could compromise its integrity.

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
Overstretching the O-ring during installation.Install the O-ring without excessive tension. It should fit snugly but not be distorted.
Using an incompatible lubricant.Consult the application's specifications or a material compatibility chart to select the appropriate lubricant for Buna-N.
Installing into a dirty or damaged groove.Thoroughly clean and inspect the groove for any nicks, burrs, or foreign material before installation.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Automotive Fuel Systems

⚠️ Engineering Warnings

  • Not recommended for applications involving strong oxidizing agents, ketones, or esters.
  • Ensure operating temperatures remain within the specified limits for Buna-N to maintain sealing performance.

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 Actuators, Automotive Fuel Systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 9.530"CS = 0.093"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.