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

Industrial Buna-N O-Ring | 8.84" ID | 7.78" OD | Stainless Steel

Expert Overview

This industrial O-ring, constructed from robust 304 stainless steel, offers superior sealing performance. Engineered for Buna-N compatibility, it ensures reliable containment in challenging applications.

StandardASTM A106
Material304 Stainless Steel
FinishPlain
GradeN/A
Inside Diameter8.840"
Outside Diameter7.779"
Cross Section0.195"

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this high-performance industrial O-ring features a precise Inside Diameter of 8.840 inches, an Outside Diameter of 7.779 inches, and a Cross Section of 0.195 inches. Fabricated from premium 304 stainless steel, it provides exceptional corrosion resistance and mechanical strength, making it ideal for environments exposed to aggressive fluids, high temperatures, and significant pressure. Its Buna-N material composition ensures excellent resistance to oils, fuels, and hydraulic fluids, guaranteeing a secure and long-lasting seal.

🧊 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 mating surfaces for any debris or damage. 2. Carefully place the O-ring into the designated groove, ensuring it sits flush and without twisting. 3. Apply a light lubricant compatible with the fluid and O-ring material if necessary for easier assembly and to prevent damage.

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
Overtightening fasteners, which can excessively compress the O-ring and lead to premature failure.Tighten fasteners to the manufacturer's recommended torque specifications, ensuring even pressure distribution.
Using incompatible lubricants or cleaning agents that degrade the Buna-N material.Always use lubricants and cleaning agents specifically approved for Buna-N and the service fluid.
Installing a twisted or kinked O-ring, compromising its sealing ability.Ensure the O-ring is laid flat and untwisted in the groove before assembly.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment
  • Automotive seals
  • Chemical processing

⚠️ Engineering Warnings

  • Ensure compatibility with the specific chemical and temperature environment.
  • Avoid exposing Buna-N to ozone, UV light, or strong oxidizing agents.
  • Proper groove design and surface finish are critical for optimal sealing performance.

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, Fluid power equipment, Automotive seals, Chemical processing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.840"CS = 0.195"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.