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Industrial Buna-N O-Ring | Carbon Steel 1.138" ID x 3.990" OD

Expert Overview

This industrial O-ring, constructed from durable Buna-N material within a carbon steel housing, is engineered for robust sealing performance in high-pressure and demanding industrial environments. Its precise dimensions ensure a secure fit.

StandardASTM A106
MaterialCarbon Steel
FinishGalvanized
GradeN/A
Inside Diameter1.138"
Outside Diameter3.990"
Cross Section0.216"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features a precise Inside Diameter of 1.138 inches, an Outside Diameter of 3.990 inches, and a Cross Section of 0.216 inches. The Buna-N (Nitrile) material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it ideal for applications involving petroleum-based substances. The carbon steel housing provides enhanced structural integrity and rigidity, crucial for maintaining seal integrity under significant mechanical stress and in corrosive environments. This combination ensures reliable static and dynamic sealing across a wide range of industrial machinery and equipment.

🧊 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 and free from debris. 2. Carefully position the O-ring within the groove, avoiding stretching or twisting. 3. Apply a light, compatible lubricant if recommended for the specific application to facilitate installation and prevent damage.

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening fasteners that compress the O-ring beyond its designed limit.Adhere to specified torque values for all fasteners to prevent extrusion or permanent deformation of the O-ring.
Using incompatible lubricants or cleaning agents that degrade Buna-N material.Consult the O-ring manufacturer's compatibility chart and use only recommended lubricants and cleaning agents.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Automotive components
  • Industrial pumps and valves

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing acids or ozone.
  • Operating temperature limits for Buna-N must be observed to prevent material degradation.

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, Automotive components, Industrial pumps and valves.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 1.138"CS = 0.216"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.