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

316 Stainless Steel Buna-N O-Ring: 3.018" ID x 8.822" OD

Expert Overview

This industrial O-ring offers exceptional sealing performance. Constructed from robust 316 stainless steel with a Buna-N elastomer, it ensures reliable containment in demanding environments.

StandardDIN 933
Material316 Stainless Steel
FinishPlain
GradeN/A
Inside Diameter3.018"
Outside Diameter8.822"
Cross Section0.158"

Detailed Engineering Specifications

A high-performance industrial component, this O-ring features an inside diameter of 3.018 inches, an outside diameter of 8.822 inches, and a cross-section of 0.158 inches. The 316 stainless steel construction provides superior corrosion resistance, particularly in harsh chemical and saltwater environments. The Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to oils, fuels, and many common industrial fluids, making it suitable for a wide range of dynamic and static sealing applications where temperature ranges from -40°F to +250°F are encountered. Its robust design ensures a tight seal against leakage under significant pressure.

🧊 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 groove is clean, free of debris, and properly dimensioned for the O-ring. 2. Lightly lubricate the O-ring with a compatible lubricant to facilitate installation and prevent damage. 3. Carefully install the O-ring into the groove, avoiding any stretching or twisting.

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)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 or stretching the O-ring during installation, leading to premature failure.Handle the O-ring with care, ensuring it is seated correctly without excessive force or elongation.
Using an incompatible lubricant that degrades the Buna-N material.Consult material compatibility charts to select a lubricant specifically recommended for Buna-N and the operating environment.

Common Applications

  • Hydraulic and pneumatic systems
  • Chemical processing equipment
  • Automotive fluid seals

⚠️ Engineering Warnings

  • Not suitable for use with ozone, UV, or weathering.
  • Avoid exposure to strong acids and ketones.

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 and pneumatic systems, Chemical processing equipment, Automotive fluid seals.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.018"CS = 0.158"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.