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

Industrial Buna-N O-Ring - 3.521" ID x 5.823" OD

Expert Overview

This industrial O-ring, crafted from robust Buna-N and featuring an Aluminum 6061 housing, provides superior sealing in critical industrial environments. Engineered for reliability and chemical resistance.

StandardDIN 933
MaterialAluminum 6061
FinishPassivated
GradeN/A
Inside Diameter3.521"
Outside Diameter5.823"
Cross Section0.233"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N O-ring boasts a precise Inside Diameter of 3.521 inches and an Outside Diameter of 5.823 inches, with a critical Cross Section measuring 0.233 inches. The integrated Aluminum 6061 housing offers excellent structural integrity and corrosion resistance, making it ideal for applications requiring a rigid seal against moderate pressures and temperatures. Buna-N (Nitrile Butadiene Rubber) is chosen for its broad resistance to oils, fuels, and hydraulic fluids, ensuring long-term performance in challenging industrial settings.

🧊 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 surfaces are clean, dry, and free from burrs or debris. 2. Carefully stretch the O-ring over the component, avoiding excessive force or sharp tools that could nick or cut the sealing element. 3. Position the O-ring squarely within its designated groove, ensuring it is seated without twisting or pinching.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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 damaged or contaminated mating surfaces.Thoroughly clean and inspect all groove surfaces before installation to prevent leaks and premature O-ring failure.
Over-stretching or twisting the O-ring during installation.Install the O-ring with deliberate care, using appropriate tools if necessary, and ensure it lies flat and uncompressed in the groove.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications exceeding Buna-N's rated limits.
  • Avoid exposure to strong oxidizing acids, ketones, and certain chlorinated hydrocarbons, as these can degrade Buna-N.

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 Aluminum 6061.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic cylinders, Fluid power equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.521"CS = 0.233"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.