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

Buna-N O-Ring, 304 SS - 8.464" ID, 4.239" OD

Expert Overview

This industrial O-ring, constructed from robust Buna-N and a 304 stainless steel housing, provides superior sealing performance. Engineered for reliability in challenging operational conditions.

StandardISO 9001
Material304 Stainless Steel
FinishGalvanized
GradeN/A
Inside Diameter8.464"
Outside Diameter4.239"
Cross Section0.187"

Detailed Engineering Specifications

Manufactured under strict quality controls, this O-ring features an inside diameter of 8.464 inches, an outside diameter of 4.239 inches, and a cross-section of 0.187 inches. The Buna-N elastomer offers excellent resistance to petroleum-based oils, greases, and hydraulic fluids, while the 304 stainless steel housing ensures high tensile strength, corrosion resistance, and structural integrity in high-pressure and extreme temperature applications. Ideal for static and dynamic sealing in pumps, valves, and machinery.

🧊 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 mating surfaces are clean, dry, and free of debris. 2. Carefully position the O-ring within its groove, avoiding stretching or twisting. 3. Apply a thin, compatible lubricant if recommended for the specific application to facilitate assembly and prevent damage.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

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
Overstretching the O-ring during installation.Install the O-ring without excessive tension. If it requires significant force, verify the groove dimensions and O-ring size.
Using incompatible lubricants or cleaning agents.Consult the material compatibility chart for Buna-N and 304 stainless steel. Only use approved lubricants and cleaners.

Common Applications

  • Hydraulic Systems
  • Pneumatic Equipment
  • Automotive Components

⚠️ Engineering Warnings

  • Not suitable for use with ketones, esters, or strong acids.
  • Prolonged exposure to ozone and UV radiation may degrade material.

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 Equipment, Automotive Components.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.464"CS = 0.187"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.