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

Buna-N O-Ring | 2.549" ID x 7.264" OD | Carbon Steel

Expert Overview

This high-performance Buna-N O-ring, constructed from robust carbon steel, ensures exceptional sealing capabilities. Its precise dimensions guarantee a secure fit in demanding industrial environments.

StandardASME B18
MaterialCarbon Steel
FinishGalvanized
GradeN/A
Inside Diameter2.549"
Outside Diameter7.264"
Cross Section0.085"

Detailed Engineering Specifications

Manufactured under strict quality controls, this Buna-N O-ring boasts an inside diameter of 2.549 inches, an outside diameter of 7.264 inches, and a cross-section of 0.085 inches. The Buna-N (Nitrile Butadiene Rubber) material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it suitable for a wide range of dynamic and static sealing applications. The carbon steel construction provides inherent strength and resilience for robust operational conditions. Meets relevant industry standards for sealing performance.

🧊 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 sealing surfaces are clean and free of debris. 2. Carefully lubricate the O-ring with a compatible lubricant. 3. Gently install the O-ring into the designated groove, avoiding any stretching or twisting.

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using the wrong lubricant, which can degrade the Buna-N material.Always consult the material compatibility chart and use a lubricant specifically approved for Buna-N.
Forcing the O-ring into place, leading to cuts or tears.Ensure proper lubrication and gentle handling during installation to prevent damage.

Common Applications

  • Hydraulic cylinders
  • Pneumatic systems
  • Fuel and oil systems

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing agents or ozone.
  • Avoid prolonged exposure to high temperatures beyond the material's operating range.

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 systems, Fuel and oil systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 2.549"CS = 0.085"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.