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

Buna-N Industrial O-Ring | Carbon Steel | 3.869" ID x 5.408" OD

Expert Overview

This industrial O-ring, fabricated from durable Buna-N encapsulated in a carbon steel housing, offers exceptional sealing performance. Precisely engineered for critical applications, it ensures reliable containment of fluids and gases.

StandardISO 9001
MaterialCarbon Steel
FinishZinc Plated
GradeN/A
Inside Diameter3.869"
Outside Diameter5.408"
Cross Section0.127"

Detailed Engineering Specifications

Specified by design engineers worldwide, this Buna-N industrial O-ring, featuring a robust carbon steel construction, is engineered for precision sealing in demanding environments. Its dimensions of 3.869" inside diameter, 5.408" outside diameter, and a 0.127" cross-section provide a secure and reliable seal. The Buna-N material offers excellent resistance to oils, fuels, and many hydraulic fluids, while the carbon steel housing provides structural integrity and enhanced pressure resistance. This combination makes it ideal for applications requiring durability and dependable sealing against moderate pressures and temperatures.

🧊 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, free of debris, and properly dimensioned. 2. Carefully place the O-ring into the groove, avoiding stretching or twisting. 3. Confirm the O-ring is seated evenly and without damage before assembly.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using excessive force during installation, leading to O-ring damage.Employ gentle, controlled pressure and consider using an O-ring lubricant suitable for the application.
Incorrect O-ring size selection, resulting in leaks or premature failure.Always verify the groove dimensions and O-ring specifications against the design requirements.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Automotive sealing components
  • Industrial machinery

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents or ozone.
  • Operating temperature range should not exceed material specifications.

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 systems, Pneumatic cylinders, Automotive sealing components, Industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.869"CS = 0.127"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.