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

Buna-N O-Ring - Carbon Steel, 5.489" ID, 5.011" OD

Expert Overview

Engineered for robust sealing, this Buna-N O-ring, housed within a carbon steel casing, provides superior resilience and chemical resistance in demanding industrial environments.

StandardASME B18
MaterialCarbon Steel
FinishPassivated
GradeN/A
Inside Diameter5.489"
Outside Diameter5.011"
Cross Section0.091"

Detailed Engineering Specifications

A high-performance industrial component, this Buna-N O-ring is precision-manufactured with an Inside Diameter of 5.489 inches, an Outside Diameter of 5.011 inches, and a critical Cross Section of 0.091 inches. The Buna-N material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it suitable for a wide range of temperature and pressure conditions. The carbon steel housing provides structural integrity and enhances its compatibility with specific mounting configurations, ensuring reliable sealing in static and dynamic applications across various industries.

🧊 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, free from debris, and properly lubricated with a compatible lubricant. 2. Carefully position the O-ring into the groove, avoiding any stretching or twisting. 3. Gently compress the O-ring to fit into the groove, ensuring an even seal without damage.

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

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
Stretching the O-ring during installation.Never stretch an O-ring beyond its elastic limit. Install without excessive tension to maintain sealing integrity.
Using an incompatible lubricant.Always consult chemical compatibility charts to select a lubricant that is suitable for both the O-ring material (Buna-N) and the fluid being sealed.
Over-tightening fasteners around the O-ring.Ensure proper torque specifications are followed for fasteners to prevent extrusion or damage to the O-ring and its groove.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • Fluid power applications
  • Automotive sealing
  • Industrial machinery

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents, ketones, or esters.
  • Operating temperature range should be strictly adhered to for optimal performance and longevity.

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 systems, Fluid power applications, Automotive sealing, Industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 5.489"CS = 0.091"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.