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

Buna-N Industrial O-Ring - 5.752" ID x 2.578" OD x 0.134" CS

Expert Overview

This robust Buna-N industrial O-ring provides reliable sealing in aggressive environments. Precisely manufactured to stringent tolerances, it ensures leak-free performance in critical fluid and gas systems.

StandardASME B18
MaterialBrass
FinishPassivated
GradeN/A
Inside Diameter5.752"
Outside Diameter2.578"
Cross Section0.134"

Detailed Engineering Specifications

Designed for demanding industrial environments, this Buna-N O-ring features a 5.752-inch inside diameter, 2.578-inch outside diameter, and a 0.134-inch cross-section. Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to oils, fuels, hydraulic fluids, and many solvents, making it suitable for a wide range of hydraulic, pneumatic, and general mechanical sealing applications. Its robust compound ensures durability and consistent performance under moderate temperature and pressure conditions, minimizing downtime and maintenance.

🧊 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. Thoroughly clean the gland and sealing surfaces to remove any debris or contaminants. 2. Inspect the O-ring for any nicks, cuts, or imperfections; replace if damaged. 3. Lubricate the O-ring and gland lightly with a compatible lubricant to facilitate installation and prevent tearing.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

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
Using incorrect lubricant that degrades Buna-N.Always use lubricants specifically recommended for Buna-N seals to prevent premature failure.
Forcing the O-ring into the gland, causing damage.Ensure the O-ring is the correct size for the gland and use gentle, even pressure during installation. Avoid sharp tools.

Common Applications

  • Hydraulic Systems
  • Pneumatic Cylinders
  • Fuel and Oil Handling Equipment
  • General Mechanical Seals

⚠️ Engineering Warnings

  • Not recommended for high-temperature applications or exposure to ozone or strong UV light.
  • Ensure compatibility with the specific fluid or gas being sealed.

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 Handling Equipment, General Mechanical Seals.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 5.752"CS = 0.134"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.