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

Industrial O-Ring | Buna-N | 7.471" ID x 4.301" OD

Expert Overview

This industrial O-ring, crafted from robust Buna-N, ensures reliable sealing in a wide range of applications. Its precise dimensions guarantee a secure fit and effective containment, minimizing leakage and downtime.

StandardASTM A106
MaterialPolycarbonate
FinishPlain
GradeN/A
Inside Diameter7.471"
Outside Diameter4.301"
Cross Section0.185"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this Buna-N O-ring boasts an inside diameter of 7.471 inches, an outside diameter of 4.301 inches, and a cross-section of 0.185 inches. Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to oils, fuels, hydraulic fluids, and general chemicals, making it ideal for demanding industrial environments. Its moderate temperature range and good abrasion resistance further enhance its suitability for applications requiring consistent, long-term sealing performance. This makes it a cost-effective choice for general-purpose sealing where petroleum-based fluids are present.

🧊 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. Clean both mating groove surfaces and the O-ring thoroughly. 2. Lubricate the O-ring and groove with a compatible lubricant. 3. Carefully insert the O-ring into the groove, ensuring it is not twisted.

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
Using the wrong lubricantAlways consult a compatibility chart to ensure the lubricant does not degrade the Buna-N material.
Overstretching the O-ring during installationInstall the O-ring without excessive stretching to prevent premature failure and leakage.
Installing a damaged O-ringInspect the O-ring for any nicks, cuts, or abrasions before installation. Replace if damaged.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fuel and oil handling
  • General industrial machinery

⚠️ Engineering Warnings

  • Not suitable for exposure to ozone, UV light, or weathering.
  • Avoid use with ketones, esters, and aromatic hydrocarbons.

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 handling, General industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.471"CS = 0.185"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.