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

Buna-N Brass O-Ring - 6.941" ID x 3.113" OD

Expert Overview

This industrial O-ring, crafted from durable Buna-N with brass components, ensures reliable sealing in critical applications. Engineered for superior performance and longevity.

StandardASME B18
MaterialBrass
FinishZinc Plated
GradeN/A
Inside Diameter6.941"
Outside Diameter3.113"
Cross Section0.126"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this Buna-N O-ring features a nominal inside diameter of 6.941 inches, an outside diameter of 3.113 inches, and a cross-section of 0.126 inches. The Buna-N material offers excellent resistance to petroleum-based oils, hydraulic fluids, and general chemicals, making it suitable for a wide range of industrial environments. The integrated brass elements enhance its structural integrity and provide specific compatibility advantages in certain fluid systems. Its precise dimensions guarantee a secure and leak-free seal under operational pressures and temperatures.

🧊 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, dry, and free of debris. 2. Carefully place the O-ring into the groove, avoiding stretching or twisting. 3. Verify proper seating and compression of the O-ring before assembling the mating component.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening fasteners, leading to O-ring extrusion or damage.Adhere to specified torque values during assembly to prevent over-compression.
Using incompatible cleaning solvents that degrade the Buna-N material.Consult material compatibility charts and use only approved cleaning agents.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment

⚠️ Engineering Warnings

  • Not suitable for applications involving strong acids or ketones.
  • Exposure to ozone and UV radiation can degrade Buna-N over time.

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, Pneumatic cylinders, Fluid power equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 6.941"CS = 0.126"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.