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

Buna-N O-Ring | 4.140" ID x 2.142" OD x 0.083" CS | Brass

Expert Overview

This industrial Buna-N O-ring, crafted with a brass material, provides reliable sealing in critical applications. Engineered for precise fit and long-term performance, it ensures integrity in demanding environments.

StandardISO 9001
MaterialBrass
FinishZinc Plated
GradeN/A
Inside Diameter4.140"
Outside Diameter2.142"
Cross Section0.083"

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this Buna-N O-ring boasts a nominal inside diameter of 4.140 inches and an outside diameter of 2.142 inches, with a precise 0.083-inch cross-section. The Buna-N (Nitrile) compound offers excellent resistance to oils, fuels, and many hydraulic fluids, making it ideal for general-purpose sealing applications. Its inherent toughness and resilience contribute to a dependable seal under moderate pressure and temperature fluctuations. The brass element, while not the primary sealing material, may indicate a specific housing or component compatibility for brass systems, requiring consideration for galvanic corrosion if in direct, prolonged contact with dissimilar metals in aggressive 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:N/A

Installation Procedure

1. Ensure the sealing groove and mating surfaces are clean, free of debris, and undamaged. 2. Lightly lubricate the O-ring with a compatible lubricant (e.g., silicone or petroleum jelly, depending on service fluid) to facilitate installation and prevent damage. 3. Carefully install the O-ring into its designated groove, ensuring it is not twisted or stretched beyond its elastic limit. Avoid using sharp tools.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using incorrect lubrication that is incompatible with the service fluid or O-ring material.Consult compatibility charts to select a lubricant that is chemically inert to both the Buna-N material and the fluid it will be sealing against.
Over-stretching or twisting the O-ring during installation, leading to premature failure.Install the O-ring gently, allowing it to seat naturally in the groove. Use a lubricant to ease insertion and prevent twisting.

Common Applications

  • Hydraulic Systems
  • Pneumatic Systems
  • Automotive Components
  • General Industrial Sealing

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing acids or ketones.
  • Prolonged exposure to direct sunlight or ozone may degrade the material.

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 Systems, Automotive Components, General Industrial Sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.140"CS = 0.083"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.