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

Industrial Buna-N O-Ring | 8.118" ID | 304 SS

Expert Overview

This industrial O-ring, crafted from robust Buna-N and housed within a 304 stainless steel casing, provides exceptional sealing integrity. Engineered for reliability in demanding fluid and gas applications.

StandardISO 9001
Material304 Stainless Steel
FinishGalvanized
GradeN/A
Inside Diameter8.118"
Outside Diameter7.813"
Cross Section0.219"

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this industrial O-ring features a precise inside diameter of 8.118 inches, an outside diameter of 7.813 inches, and a cross-section of 0.219 inches. The Buna-N elastomer offers excellent resistance to petroleum-based oils, hydraulic fluids, and greases, making it suitable for a wide array of industrial sealing duties. The integrated 304 stainless steel construction provides superior corrosion resistance and structural integrity, especially in harsh chemical environments or at elevated temperatures, ensuring long-term performance and preventing extrusion failures.

🧊 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. Inspect the groove and sealing surfaces for cleanliness, damage, or foreign debris. 2. Carefully lubricate the O-ring and groove with a compatible lubricant to prevent tearing during installation. 3. Gently install the O-ring into the designated groove, ensuring it is seated evenly and without twisting.

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
Overtightening fasteners, leading to O-ring extrusion or damage.Adhere to specified torque values for all fasteners to prevent over-compression of the O-ring.
Using incompatible lubricants or cleaning agents, degrading the Buna-N material.Always use lubricants and cleaning agents specifically rated for compatibility with Buna-N elastomers and the media being sealed.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Chemical processing equipment
  • Automotive fuel systems

⚠️ Engineering Warnings

  • Not suitable for use with ozone, ketones, esters, or chlorinated hydrocarbons.
  • Ensure operating temperature is within the specified range for Buna-N elastomers to maintain seal integrity.

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 cylinders, Chemical processing equipment, Automotive fuel systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.118"CS = 0.219"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.