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

Industrial O-Ring: Buna-N, 3.231" ID, 2.799" OD, 0.156" CS

Expert Overview

This industrial O-ring, constructed from durable Buna-N, ensures exceptional sealing performance. Its precise dimensions guarantee a secure fit and prevent leaks in critical systems.

StandardASTM A106
MaterialNylon
FinishAnodized
GradeN/A
Inside Diameter3.231"
Outside Diameter2.799"
Cross Section0.156"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N O-ring features an Inside Diameter of 3.231 inches, an Outside Diameter of 2.799 inches, and a Cross Section of 0.156 inches. Buna-N (Nitrile) offers excellent resistance to oils, fuels, hydraulic fluids, and general chemicals, making it ideal for a wide range of industrial environments. Its robust construction ensures reliable sealing under moderate pressure and temperature conditions, preventing leakage and maintaining system integrity.

🧊 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 install the O-ring into the groove, avoiding stretching or twisting. 3. Verify proper seating and compression of the O-ring before system operation.

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
Overstretching the O-ring during installation.Gently guide the O-ring into the groove to avoid excessive tension, which can lead to premature failure.
Installing a dirty or damaged O-ring.Inspect the O-ring for nicks, cuts, or debris before installation and ensure the mating surfaces are clean.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • Automotive seals
  • Industrial machinery

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing acids or ketones.
  • Consult chemical compatibility charts for specific fluid applications.

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 Nylon.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic systems, Automotive seals, Industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.231"CS = 0.156"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.