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

Industrial Buna-N O-Ring | 4.588" ID x 5.556" OD x 0.187" CS

Expert Overview

This industrial O-ring, crafted from durable Buna-N material, ensures reliable sealing in demanding environments. Its precise dimensions guarantee a secure fit and effective barrier against leaks.

StandardISO 9001
MaterialBrass
FinishBlack Oxide
GradeN/A
Inside Diameter4.588"
Outside Diameter5.556"
Cross Section0.187"

Detailed Engineering Specifications

Specified by design engineers worldwide, this Buna-N O-ring is engineered for exceptional performance in a wide range of industrial applications. The material offers superior resistance to petroleum-based oils, fuels, and hydraulic fluids, making it ideal for dynamic and static sealing. With an inside diameter of 4.588 inches, an outside diameter of 5.556 inches, and a precise 0.187-inch cross-section, this seal provides an optimal compression set and excellent resilience, ensuring long-term operational integrity.

🧊 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 mating groove is clean, free of debris, and properly lubricated. 2. Carefully place the O-ring into the groove, avoiding stretching or twisting. 3. Assemble mating components, applying even pressure to seat the O-ring without pinching.

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 / ExposedModerate
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening or excessive stretching during installation.Install the O-ring without undue force; it should drop into the groove with minimal effort.
Using incompatible lubricants that degrade Buna-N.Consult the material compatibility chart and use only approved lubricants, such as silicone or fluorinated greases.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fuel and oil lines

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, UV, or weathering.
  • Avoid exposure to strong acids and polar solvents, 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, Fuel and oil lines.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.588"CS = 0.187"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.