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Buna-N Industrial O-Ring, 6.491" ID x 5.309" OD, Carbon Steel

Expert Overview

This industrial Buna-N O-ring, constructed with a robust carbon steel core, delivers exceptional sealing performance. Engineered for reliability in demanding applications, it provides a secure barrier against fluid and gas leakage.

StandardASME B18
MaterialCarbon Steel
FinishAnodized
GradeN/A
Inside Diameter6.491"
Outside Diameter5.309"
Cross Section0.211"

Detailed Engineering Specifications

A proven choice for industrial professionals, this Buna-N O-ring offers superior resistance to oils, fuels, and hydraulic fluids, making it ideal for a wide range of demanding environments. The specified dimensions, with an Inside Diameter of 6.491 inches, an Outside Diameter of 5.309 inches, and a precise Cross Section of 0.211 inches, ensure a tight and effective seal. The carbon steel material provides structural integrity and enhanced durability, resisting deformation under pressure and extending service life in critical sealing applications. This combination of material and dimensional accuracy guarantees consistent performance and operational efficiency.

🧊 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 surfaces are clean, dry, and free of debris. 2. Carefully place the O-ring into its designated groove, avoiding any stretching or twisting. 3. Assemble the components, ensuring even pressure is applied across the entire surface of the O-ring.

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
Overtightening fasteners, which can crush or deform the O-ring, compromising the seal.Tighten fasteners to the manufacturer's recommended torque specifications to prevent over-compression.
Using an O-ring that is incompatible with the fluid or operating temperature.Verify the material compatibility (Buna-N in this case) with the specific media and environmental conditions before installation.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fuel and oil handling equipment

⚠️ Engineering Warnings

  • Not suitable for exposure to ozone, strong acids, or high temperatures above Buna-N's recommended limits.
  • Ensure proper groove design and lubrication for optimal sealing performance and ease of installation.

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, Fuel and oil handling equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 6.491"CS = 0.211"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.