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

304 Stainless Steel Buna-N O-Ring - 3.383" ID x 9.388" OD

Expert Overview

This industrial O-ring, constructed from robust Buna-N and a 304 stainless steel housing, offers superior sealing performance. Engineered for extreme conditions, it ensures reliable containment of fluids and gases in critical industrial systems.

StandardDIN 933
Material304 Stainless Steel
FinishAnodized
GradeN/A
Inside Diameter3.383"
Outside Diameter9.388"
Cross Section0.081"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this O-ring features a precise Inside Diameter of 3.383 inches, an Outside Diameter of 9.388 inches, and a Cross Section of 0.081 inches. The Buna-N elastomer provides excellent resistance to oils, fuels, and hydraulic fluids, while the 304 stainless steel housing offers exceptional corrosion resistance, high tensile strength, and durability in aggressive environments. This combination makes it ideal for static and dynamic sealing in chemical processing, automotive, aerospace, and general industrial machinery where extreme temperature fluctuations and chemical exposure are common.

🧊 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. Clean mating grooves thoroughly to remove any debris or contaminants. 2. Lubricate the O-ring lightly with a compatible lubricant to facilitate installation and prevent damage. 3. Carefully insert the O-ring into its designated groove, ensuring it is seated evenly without twisting or stretching.

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
Using the wrong lubricant.Always consult compatibility charts to ensure the lubricant does not degrade the Buna-N material or the stainless steel housing.
Overstretching or twisting the O-ring during installation.Install the O-ring by gently rolling it into place, avoiding excessive force or distortion.

Common Applications

  • Hydraulic Systems
  • Pneumatic Systems
  • Chemical Processing Equipment
  • Automotive Fuel Systems
  • Oil & Gas Exploration

⚠️ Engineering Warnings

  • Not suitable for applications involving strong oxidizing acids or ketones.
  • Ensure operating temperatures remain within the specified range for Buna-N elastomers.

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 Systems, Chemical Processing Equipment, Automotive Fuel Systems, Oil & Gas Exploration.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.383"CS = 0.081"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.