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

Brass Buna-N Industrial O-Ring | 1.872" ID x 4.493" OD

Expert Overview

This industrial-grade Buna-N O-ring, featuring a brass construction, delivers robust sealing for high-pressure and demanding applications. Engineered for reliability and longevity in harsh operational conditions.

StandardASTM A106
MaterialBrass
FinishPlain
GradeN/A
Inside Diameter1.872"
Outside Diameter4.493"
Cross Section0.207"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring boasts a precise inside diameter of 1.872 inches, an outside diameter of 4.493 inches, and a substantial cross-section of 0.207 inches. The Buna-N (Nitrile Butadiene Rubber) material offers excellent resistance to oils, fuels, hydraulic fluids, and general chemicals, making it suitable for a wide array of industrial fluid power and general mechanical systems. The brass component ensures compatibility with specific fluid or environmental requirements where non-ferrous metals are mandated, providing superior durability and chemical stability in its intended operational envelope.

🧊 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:N/A

Installation Procedure

1. Ensure mating surfaces are clean, dry, and free of debris. 2. Carefully compress and install the O-ring into its designated groove, avoiding excessive stretching or twisting. 3. Verify proper seating and seal integrity before applying operational pressure.

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

Copper (Cu)60.0 - 63.0%
Zinc (Zn)Balance
Lead (Pb)2.5 - 3.7%

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 during installation, leading to compression set and premature failure.Install with minimal compression necessary to achieve a seal, ensuring the O-ring is not deformed beyond its elastic limits.
Using the wrong O-ring material for the specific fluid or operating temperature.Always verify Buna-N compatibility with the chemical and temperature conditions of the application to prevent degradation and leakage.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment
  • Automotive and transportation
  • Chemical processing

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents or polar solvents.
  • Avoid prolonged exposure to UV radiation and ozone, 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 Brass.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic cylinders, Fluid power equipment, Automotive and transportation, Chemical processing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 1.872"CS = 0.207"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.