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

304 Stainless Steel O-Ring | Buna-N Seal | 2.6" ID x 4.39" OD

Expert Overview

This industrial O-ring features a robust Buna-N sealing element housed within a durable 304 stainless steel casing. Engineered for superior chemical resistance and mechanical integrity, it ensures reliable sealing in challenging environments.

StandardDIN 933
Material304 Stainless Steel
FinishAnodized
GradeN/A
Inside Diameter2.603"
Outside Diameter4.393"
Cross Section0.222"

Detailed Engineering Specifications

Engineered for reliability and performance, this industrial O-ring boasts a Buna-N sealing element encapsulated within a 304 stainless steel housing. The precise dimensions of a 2.603" inside diameter, 4.393" outside diameter, and a 0.222" cross-section ensure a secure fit and effective seal. The 304 stainless steel provides excellent corrosion resistance, making it suitable for use with a wide range of chemicals and in various industrial settings where standard elastomers may degrade. This combination offers superior durability and longevity compared to single-material O-rings.

🧊 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 and free of debris. 2. Carefully place the O-ring into its designated groove, avoiding overstretching or twisting. 3. Assemble mating components, ensuring even pressure distribution to achieve a proper seal.

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 O-ring size for the groove.Always verify the O-ring's inside diameter, outside diameter, and cross-section against the groove dimensions and manufacturer specifications.
Damaging the O-ring during installation due to sharp edges or excessive force.Inspect grooves for burrs or sharp edges. Lubricate the O-ring with a compatible lubricant if necessary and install with gentle, even pressure.

Common Applications

  • Hydraulic and pneumatic systems
  • Chemical processing equipment
  • Automotive and aerospace components

⚠️ Engineering Warnings

  • Ensure material compatibility with the specific fluid or gas being sealed.
  • Do not exceed the maximum operating temperature and pressure ratings for Buna-N and 304 stainless steel.

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 and pneumatic systems, Chemical processing equipment, Automotive and aerospace components.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 2.603"CS = 0.222"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.