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

Buna-N O-Ring 7.313" ID x 9.107" OD - Polycarbonate

Expert Overview

This high-performance Buna-N O-ring, constructed from durable polycarbonate, offers exceptional sealing integrity. Its precise dimensions ensure a reliable fit in demanding industrial environments, preventing leaks and contamination.

StandardISO 9001
MaterialPolycarbonate
FinishBlack Oxide
GradeN/A
Inside Diameter7.313"
Outside Diameter9.107"
Cross Section0.215"

Detailed Engineering Specifications

Specified by design engineers worldwide, this Buna-N O-ring boasts a 7.313" inside diameter, a 9.107" outside diameter, and a 0.215" cross-section. The polycarbonate material provides robust resistance to oils, fuels, and many chemicals, making it ideal for static and dynamic applications where environmental compatibility and long-term performance are paramount. Its Shore A hardness of 70 (typical for Buna-N) offers a balance of elasticity and compression set resistance, ensuring a consistent seal over time.

🧊 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 grooves are clean, free of debris, and properly machined. 2. Lubricate the O-ring and groove with a compatible lubricant to prevent damage during installation. 3. Carefully install the O-ring into the groove, ensuring it is seated evenly and without twisting.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

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 dry O-ring, leading to tearing or stretching.Always use a compatible lubricant and apply it to both the O-ring and the groove before installation.
Using the wrong O-ring size for the application, resulting in improper sealing.Verify the O-ring dimensions (ID, OD, CS) match the groove specifications precisely before selection and installation.

Common Applications

  • Hydraulic and pneumatic systems
  • Automotive fuel systems
  • General industrial machinery sealing

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications or exposure to strong oxidizing agents.
  • Ensure compatibility with all fluid media and operating temperatures before use.

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 and pneumatic systems, Automotive fuel systems, General industrial machinery sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.313"CS = 0.215"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.