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

Buna-N O-Ring: 3.845" ID x 8.937" OD x 0.205" CS | Aluminum 6061

Expert Overview

This industrial O-ring, constructed from robust Aluminum 6061, is engineered for exceptional sealing performance in harsh environments. Its precise dimensions ensure a secure fit for critical applications.

StandardDIN 933
MaterialAluminum 6061
FinishPlain
GradeN/A
Inside Diameter3.845"
Outside Diameter8.937"
Cross Section0.205"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features an Inside Diameter (ID) of 3.845 inches, an Outside Diameter (OD) of 8.937 inches, and a Cross Section (CS) of 0.205 inches. The Aluminum 6061 construction offers excellent corrosion resistance and structural integrity, making it suitable for demanding environments such as hydraulic systems, pneumatic assemblies, and chemical processing equipment where reliable, long-term sealing is paramount. This material choice ensures durability and resistance to wear under significant operational stress.

🧊 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 sealing groove is clean and free of debris. 2. Carefully position the O-ring within the groove, avoiding excessive stretching. 3. Verify the O-ring is seated correctly and uniformly before assembly.

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
Overtightening fasteners, leading to O-ring extrusion.Adhere to specified torque values during assembly to prevent premature O-ring failure.
Using incompatible lubricants that degrade Buna-N material.Consult material compatibility charts and use only approved lubricants for Buna-N applications.

Common Applications

  • Hydraulic Cylinder Seals
  • Pneumatic Actuators
  • Chemical Processing Equipment

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents.
  • Temperature limits for Buna-N must be observed for optimal performance and longevity.

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 Cylinder Seals, Pneumatic Actuators, Chemical Processing Equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.845"CS = 0.205"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.