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

Industrial Buna-N O-Ring | 9.191" ID x 9.942" OD x 0.181" CS

Expert Overview

This industrial Buna-N o-ring provides exceptional sealing performance in a wide range of applications. Precisely manufactured to critical dimensions for reliable, leak-free operation in dynamic and static environments.

StandardASME B18
MaterialNylon
FinishAnodized
GradeN/A
Inside Diameter9.191"
Outside Diameter9.942"
Cross Section0.181"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N (Nitrile Butadiene Rubber) o-ring features an Inside Diameter of 9.191 inches, an Outside Diameter of 9.942 inches, and a precise Cross Section of 0.181 inches. Buna-N offers excellent resistance to petroleum-based oils, greases, hydraulic fluids, and water, making it ideal for general-purpose sealing in industrial machinery, automotive systems, and fluid power applications. Its operating temperature range is typically -30°F to 250°F (-34°C to 121°C), ensuring durability in moderate temperature conditions. The inherent resilience of Buna-N allows for effective compression sealing.

🧊 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:N/A

Installation Procedure

1. Ensure the mating groove is clean, free of debris, and properly dimensioned for the o-ring's cross-section. 2. Lightly lubricate the o-ring and the groove with a compatible lubricant (e.g., silicone grease or a drop of the fluid being sealed) to prevent tearing during installation. 3. Carefully install the o-ring into the groove, avoiding stretching or twisting, and ensure it is seated uniformly.

Equivalent Standards (Cross-Reference)

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

Mechanical Properties

Tensile StrengthStandard Commercial Spec
Yield StrengthStandard Commercial Spec
HardnessVaries by specific batch

Temperature & Environment Rating

Min Operating Temp
-20°F (-29°C)
Max Continuous Temp
400°F (204°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 / ExposedModerate
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening or excessive stretching during installationInstall the o-ring without undue force or stretching, ensuring it sits flush within the groove.
Using incompatible lubricants or cleaning agentsConsult compatibility charts to ensure lubricants and cleaning agents do not degrade the Buna-N material.
Installing into a damaged or dirty grooveThoroughly inspect and clean the groove before installation to prevent premature seal failure.

Common Applications

  • Hydraulic Systems
  • Pneumatic Systems
  • Oil and Gas Equipment
  • Automotive Seals
  • General Machinery

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, UV, or weathering.
  • Avoid exposure to strong acids, ketones, esters, and chlorinated hydrocarbons.
  • Ensure operating temperature and fluid compatibility for optimal performance and lifespan.

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 Nylon.

Q: What are the main applications?

A: Hydraulic Systems, Pneumatic Systems, Oil and Gas Equipment, Automotive Seals, General Machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 9.191"CS = 0.181"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.