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

Buna-N Industrial O-Ring - 7.430" ID, 0.309" OD, 0.122" CS

Expert Overview

This industrial O-ring, constructed from robust Buna-N, offers exceptional sealing performance for critical applications. Its precise dimensions ensure a reliable, leak-proof fit in various mechanical systems.

StandardISO 9001
MaterialPolycarbonate
FinishAnodized
GradeN/A
Inside Diameter7.430"
Outside Diameter0.309"
Cross Section0.122"

Detailed Engineering Specifications

Manufactured under strict quality controls, this Buna-N O-ring features an Inside Diameter of 7.430 inches, an Outside Diameter of 0.309 inches, and a Cross Section of 0.122 inches. Buna-N (Nitrile Butadiene Rubber) provides excellent resistance to oils, fuels, hydraulic fluids, and general wear, making it suitable for a wide range of industrial sealing duties. Its moderate temperature range and good mechanical properties ensure dependable performance in static and dynamic applications.

🧊 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 groove and mating surfaces for cleanliness and absence of damage. 2. Carefully stretch the O-ring over the smaller diameter of the assembly or slide it into the groove, avoiding excessive stretching or pinching. 3. Ensure the O-ring is seated completely and evenly within the groove, verifying no twists or distortions.

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
Overtightening during installation, causing excessive compression and premature failure.Apply only the necessary compression to achieve a seal; consult system design specifications for optimal compression values.
Using the wrong O-ring material for the fluid or operating environment, leading to degradation.Verify material compatibility with the specific media and operating temperature before selecting the O-ring.

Common Applications

  • Hydraulic Systems
  • Pneumatic Cylinders
  • Fuel and Oil Lines
  • General Machinery Seals

⚠️ Engineering Warnings

  • Not suitable for exposure to ozone, strong acids, or polar solvents.
  • Ensure proper storage to prevent degradation from UV light and extreme temperatures.

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 Cylinders, Fuel and Oil Lines, General Machinery Seals.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.430"CS = 0.122"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.