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

Buna-N O-Ring | 9.661" ID | 3.261" OD | Stainless Steel

Expert Overview

Engineered for superior sealing, this Buna-N O-ring, constructed with robust 304 Stainless Steel, offers exceptional chemical resistance and durability for critical industrial applications.

StandardDIN 933
Material304 Stainless Steel
FinishAnodized
GradeN/A
Inside Diameter9.661"
Outside Diameter3.261"
Cross Section0.125"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N O-ring boasts a precise Inside Diameter of 9.661 inches and an Outside Diameter of 3.261 inches, with a consistent Cross Section of 0.125 inches. The 304 stainless steel construction provides excellent corrosion resistance, making it suitable for a wide range of chemical and environmental conditions. Its robust design ensures reliable sealing under pressure and temperature fluctuations, preventing leaks in demanding hydraulic, pneumatic, and fluid handling systems.

🧊 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 the sealing groove is clean and free from debris or damage. 2. Lightly lubricate the O-ring with a compatible lubricant to prevent pinching and facilitate installation. 3. Carefully install the O-ring into the groove, ensuring it sits evenly and is not twisted.

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 the gland, which can crush the O-ring.Adhere to manufacturer's recommended gland compression values, typically 10-25% of the cross-section.
Using incompatible lubricants or cleaning agents.Consult material compatibility charts to select lubricants and cleaners that will not degrade the Buna-N material.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents or ketones.
  • Avoid prolonged exposure to UV radiation and ozone, which can degrade Buna-N.

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.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 9.661"CS = 0.125"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.