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

Buna-N O-Ring | 3" ID x 7.75" OD | Carbon Steel

Expert Overview

This industrial O-ring, crafted from durable Buna-N material with a carbon steel construction, ensures superior sealing in high-pressure environments. Its precise dimensions guarantee a leak-proof fit.

StandardASTM A106
MaterialCarbon Steel
FinishAnodized
GradeN/A
Inside Diameter3.001"
Outside Diameter7.746"
Cross Section0.151"

Detailed Engineering Specifications

Engineered for reliability and performance, this Buna-N O-ring features an inside diameter of 3.001 inches, an outside diameter of 7.746 inches, and a cross-section of 0.151 inches. The Buna-N (Nitrile) material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it ideal for general-purpose sealing applications. The carbon steel construction provides enhanced rigidity and durability for heavy-duty industrial use, resisting deformation under pressure and extreme operating conditions. This combination ensures long-term sealing integrity in demanding environments.

🧊 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, dry, and free of debris. 2. Carefully inspect the O-ring for any nicks, cuts, or defects. 3. Gently stretch and place the O-ring into the groove, avoiding any sharp tools that could damage 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
Overt stretching during installation.Gently ease the O-ring into the groove without excessive stretching to prevent premature failure.
Using sharp tools to install the O-ring.Employ only hand pressure or appropriate, non-marring installation tools to avoid damaging the O-ring surface.

Common Applications

  • Hydraulic systems
  • Pneumatic assemblies
  • Fluid power equipment

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications or exposure to ozone, UV, or weathering.
  • Consult chemical compatibility charts for specific fluid interactions before deployment.

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 assemblies, Fluid power equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.001"CS = 0.151"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.