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

Industrial Buna-N O-Ring | Carbon Steel, 5.032" OD

Expert Overview

This industrial O-ring, crafted from robust Buna-N and housed in a carbon steel casing, delivers exceptional sealing performance. Engineered for demanding environments, it provides reliable containment in critical fluid and gas systems.

StandardASTM A106
MaterialCarbon Steel
FinishPassivated
GradeN/A
Inside Diameter1.369"
Outside Diameter5.032"
Cross Section0.210"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features a precise 1.369" inside diameter, a 5.032" outside diameter, and a 0.210" cross-section. The Buna-N material offers excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for static and dynamic sealing in automotive, hydraulic, and pneumatic systems. The carbon steel casing enhances its durability and structural integrity, ensuring consistent sealing under pressure and temperature extremes.

🧊 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 groove or mating surfaces are clean and free from debris. 2. Carefully lubricate the O-ring and the groove with a compatible lubricant. 3. Gently insert the O-ring into the groove, avoiding stretching or twisting.

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
Overtightening the assembly, which can compress the O-ring excessively and lead to premature failure.Tighten fasteners to the manufacturer's recommended torque specifications.
Using incompatible lubricants or cleaning agents that can degrade the Buna-N material.Consult the Buna-N material compatibility chart and use only approved lubricants and cleaners.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fuel lines and components
  • Automotive seals
  • Industrial machinery

⚠️ Engineering Warnings

  • Not suitable for applications involving strong acids, ketones, or esters.
  • Avoid prolonged exposure to direct sunlight or UV radiation, which can degrade Buna-N.

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 lines and components, Automotive seals, Industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 1.369"CS = 0.210"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.