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Industrial O-Ring, Buna-N | 9" ID | 304 Stainless Steel

Expert Overview

Engineered for superior sealing performance, this industrial O-ring features a robust Buna-N elastomer combined with the corrosion resistance of 304 stainless steel. Designed for precision and longevity in critical applications.

StandardDIN 933
Material304 Stainless Steel
FinishPassivated
GradeN/A
Inside Diameter9.018"
Outside Diameter10.166"
Cross Section0.102"

Detailed Engineering Specifications

Specified by design engineers worldwide, this industrial O-ring is constructed from Buna-N (Nitrile Butadiene Rubber) for excellent resistance to oils, fuels, and many hydraulic fluids. The supporting structure is fabricated from high-grade 304 stainless steel, offering superior corrosion resistance and mechanical strength. With an inside diameter of 9.018 inches, an outside diameter of 10.166 inches, and a precise cross-section of 0.102 inches, it ensures a tight and reliable seal in a wide range of industrial environments. This combination of materials makes it ideal for applications requiring both chemical inertness and structural integrity under moderate pressure and temperature variations.

🧊 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 grooves are clean, dry, and free of debris. 2. Carefully position the O-ring within its designated groove, avoiding stretching or twisting. 3. Apply a light, compatible lubricant if necessary to facilitate assembly and prevent damage during compression.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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, causing excessive compression and premature failure.Follow torque specifications precisely and use calibrated tools.
Using incompatible lubricants that degrade the Buna-N elastomer.Consult material compatibility charts and use only approved lubricants.
Damaging the O-ring during installation with sharp tools or excessive force.Handle the O-ring with care and use rounded installation tools if needed.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Fluid Power Equipment
  • Oil and Gas Exploration
  • Automotive Fuel Systems

⚠️ Engineering Warnings

  • Not recommended for applications involving prolonged exposure to ozone, strong acids, or high temperatures exceeding Buna-N's operational limits.
  • Verify chemical compatibility for specific media before deployment to prevent material degradation.

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 Actuators, Fluid Power Equipment, Oil and Gas Exploration, Automotive Fuel Systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 9.018"CS = 0.102"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.