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

Buna-N O-Ring | 304 Stainless Steel | 3.249" ID x 0.550" OD

Expert Overview

This robust industrial O-ring, constructed from high-grade Buna-N and a durable 304 stainless steel housing, offers superior sealing performance. Engineered for resilience against chemicals and extreme temperatures, ensuring reliable operation in critical systems.

StandardASTM A106
Material304 Stainless Steel
FinishGalvanized
GradeN/A
Inside Diameter3.249"
Outside Diameter0.550"
Cross Section0.122"

Detailed Engineering Specifications

Designed for demanding industrial environments, this O-ring features a 3.249" inside diameter, 0.550" outside diameter, and a 0.122" cross-section. The Buna-N elastomer provides excellent resistance to petroleum-based oils, hydraulic fluids, and many other chemicals, while the 304 stainless steel casing offers exceptional corrosion resistance and structural integrity. This combination makes it ideal for high-pressure hydraulic systems, pneumatic assemblies, and fluid handling applications where both chemical compatibility and mechanical strength 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:Yes

Installation Procedure

1. Ensure the sealing groove is clean and free of debris. 2. Carefully stretch and place the O-ring into the designated groove, avoiding sharp tools. 3. Verify the O-ring is seated properly and uniformly within the groove before assembly.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

Mechanical Properties

Tensile Strength75,000 psi (515 MPa)
Yield Strength30,000 psi (205 MPa)
Elongation in 2 in.40% min
HardnessRockwell B95 max

Chemical Composition

Carbon (C)0.08% max
Chromium (Cr)18.0 - 20.0%
Nickel (Ni)8.0 - 10.5%
Manganese (Mn)2.00% max

Temperature & Environment Rating

Min Operating Temp
-320°F (-195°C)
Max Continuous Temp
1400°F (760°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 / SaltwaterGood
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using excessive force or sharp tools during installation, which can nick or cut the O-ring.Handle the O-ring with care and use a non-marring installation tool or fingertip pressure to seat it.
Installing the O-ring into a dirty or damaged groove, leading to leakage or premature failure.Thoroughly inspect and clean the sealing groove before installation. Repair any damage to the groove if necessary.

Common Applications

  • Hydraulic Systems
  • Pneumatic Assemblies
  • Fluid Power Equipment
  • Chemical Processing

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing acids or ketones.
  • Ensure compatibility with specific media and operating temperatures before deployment.

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 304 Stainless Steel.

Q: What are the main applications?

A: Hydraulic Systems, Pneumatic Assemblies, Fluid Power Equipment, Chemical Processing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.249"CS = 0.122"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.