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

Buna-N O-Ring, Brass, 8.112" ID, 4.773" OD

Expert Overview

This industrial O-ring, constructed with durable Buna-N and a Brass gland, ensures reliable sealing in challenging environments. Its precise dimensions provide a secure fit for critical fluid and gas containment.

StandardDIN 933
MaterialBrass
FinishPlain
GradeN/A
Inside Diameter8.112"
Outside Diameter4.773"
Cross Section0.226"

Detailed Engineering Specifications

A high-performance industrial component, this Buna-N O-ring is engineered for robust sealing applications. Featuring an inside diameter of 8.112 inches, an outside diameter of 4.773 inches, and a cross-section of 0.226 inches, it provides a consistent and reliable seal. The Buna-N material offers excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for use in a wide range of industrial machinery, automotive systems, and chemical processing equipment where chemical compatibility and resilience are paramount.

🧊 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 from debris. 2. Carefully install the O-ring into the designated groove, avoiding excessive stretching or twisting. 3. Assemble mating components, ensuring even pressure distribution to achieve a proper seal.

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

Chemical Composition

Copper (Cu)60.0 - 63.0%
Zinc (Zn)Balance
Lead (Pb)2.5 - 3.7%

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
Overstretching the O-ring during installation, leading to premature failure and leakage.Install the O-ring without excessive tension. If the O-ring is difficult to fit, ensure the groove is correctly sized and lubricate if necessary with a compatible lubricant.
Using incompatible lubricants or cleaning agents that can degrade the Buna-N material.Always verify that any lubricants or cleaning agents used are compatible with Buna-N to prevent material degradation and seal failure.

Common Applications

  • Hydraulic Systems
  • Automotive Fuel Systems
  • Chemical Processing Equipment

⚠️ Engineering Warnings

  • Not recommended for use with ozone, ketones, esters, or chlorinated solvents.
  • Ensure operating temperatures remain within the specified range for Buna-N material to maintain optimal performance.

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 Brass.

Q: What are the main applications?

A: Hydraulic Systems, Automotive Fuel Systems, Chemical Processing Equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.112"CS = 0.226"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.