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

Buna-N Industrial O-Ring | 5.707" ID x 8.357" OD x 0.275" CS

Expert Overview

This industrial O-ring, crafted from robust Buna-N, is engineered for exceptional sealing performance in demanding environments. Its precise dimensions ensure reliable containment of fluids and gases under significant pressure.

StandardASTM A106
MaterialCarbon Steel
FinishPlain
GradeN/A
Inside Diameter5.707"
Outside Diameter8.357"
Cross Section0.275"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features an Inside Diameter of 5.707 inches, an Outside Diameter of 8.357 inches, and a Cross Section of 0.275 inches. The Buna-N (Nitrile Rubber) material offers excellent resistance to oils, fuels, hydraulic fluids, and many solvents, making it suitable for a wide range of industrial hydraulic and pneumatic systems. Its carbon steel composition contributes to its durability and resistance to deformation under extreme operational conditions. This O-ring is engineered for superior sealing integrity in static and dynamic applications where reliability is paramount.

🧊 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 is clean and free of debris or damage. 2. Carefully lubricate the O-ring with a compatible lubricant if recommended for the application. 3. Gently stretch the O-ring over the shaft or into the groove, avoiding any sharp tools that could nick or cut the material.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

Mechanical Properties

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

Chemical Composition

Carbon (C)0.28 - 0.55%
Manganese (Mn)0.60 - 0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.05% max

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
Using incorrect O-ring size for the groove.Verify the groove dimensions against the O-ring's Inside Diameter, Outside Diameter, and Cross Section specifications for a proper fit.
Installing the O-ring with a dry surface.Apply a small amount of compatible lubricant to ease installation and prevent material damage, ensuring the lubricant is compatible with the O-ring material and the fluid being sealed.
Using sharp objects to force installation.Employ proper installation tools or techniques that avoid pinching, cutting, or otherwise damaging the O-ring during placement.

Common Applications

  • Hydraulic Cylinders
  • Pneumatic Actuators
  • Fluid Power Systems
  • Oil and Gas Equipment

⚠️ Engineering Warnings

  • Ensure material compatibility with the specific fluid or gas being sealed to prevent degradation.
  • Avoid exposure to ozone, UV light, or high temperatures beyond the material's rated limits, as this can accelerate aging and failure.

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 Carbon Steel.

Q: What are the main applications?

A: Hydraulic Cylinders, Pneumatic Actuators, Fluid Power Systems, Oil and Gas Equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 5.707"CS = 0.275"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.