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

Buna-N Industrial O-Ring - 316 Stainless Steel

Expert Overview

This industrial O-ring features a robust Buna-N sealing element encased in premium 316 stainless steel. Engineered for exceptional resilience and chemical resistance, it ensures reliable performance in critical sealing applications.

StandardASME B18
Material316 Stainless Steel
FinishZinc Plated
GradeN/A
Inside Diameter8.235"
Outside Diameter2.235"
Cross Section0.084"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this Buna-N O-ring boasts an inside diameter of 8.235 inches, an outside diameter of 2.235 inches, and a precise cross-section of 0.084 inches. The 316 stainless steel housing provides superior corrosion resistance, excellent mechanical strength, and broad chemical compatibility, making it ideal for aggressive media and high-pressure systems. Its Buna-N compound offers good resistance to oils, fuels, and hydraulic fluids, suitable for a wide range of industrial fluid power, automotive, and manufacturing environments.

🧊 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 mating groove surfaces are clean, dry, and free from debris. 2. Carefully insert the O-ring into the groove, avoiding stretching or twisting. 3. Apply a thin layer of compatible lubricant if necessary to facilitate installation and ensure a proper seal.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

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)16.0 - 18.0%
Nickel (Ni)10.0 - 14.0%
Molybdenum (Mo)2.0 - 3.0%

Temperature & Environment Rating

Min Operating Temp
-320°F (-195°C)
Max Continuous Temp
1500°F (815°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 / SaltwaterExcellent
Chemical / AcidicGood

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening during assemblyApply only the required torque to achieve a seal; overtightening can damage the O-ring and groove.
Using incorrect lubricantAlways use a lubricant compatible with both the O-ring material (Buna-N) and the system fluid to prevent degradation.
Installing on a damaged surfaceInspect the groove for sharp edges, scratches, or debris that could cut or nick the O-ring during installation.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Automotive Fuel Systems
  • Industrial Pumps and Valves

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, strong oxidizing agents, or UV exposure.
  • Verify chemical compatibility with the specific system media before use.

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 316 Stainless Steel.

Q: What are the main applications?

A: Hydraulic Systems, Pneumatic Actuators, Automotive Fuel Systems, Industrial Pumps and Valves.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 8.235"CS = 0.084"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.