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

Buna-N O-Ring 4.799" ID x 7.329" OD x 0.078" CS

Expert Overview

This industrial O-ring, crafted from Buna-N (Nitrile Butadiene Rubber), ensures robust sealing performance. Its precise dimensions and material properties make it ideal for a wide range of static and dynamic sealing applications.

StandardASME B18
MaterialPolycarbonate
FinishAnodized
GradeN/A
Inside Diameter4.799"
Outside Diameter7.329"
Cross Section0.078"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this Buna-N O-ring features an inside diameter of 4.799 inches, an outside diameter of 7.329 inches, and a cross-section of 0.078 inches. Buna-N, also known as Nitrile Butadiene Rubber, offers excellent resistance to oils, fuels, hydraulic fluids, and general chemicals, making it a cost-effective choice for many industrial environments. Its operational temperature range is typically -30°F to 250°F (-34°C to 121°C). This material exhibits good abrasion and tear resistance, contributing to extended service life.

🧊 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 and O-ring are clean and free of debris. 2. Lubricate the O-ring and groove with a compatible lubricant. 3. Carefully install the O-ring, avoiding any stretching or twisting, and ensure it sits flush within the groove.

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

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 incompatible lubricants or cleaning agents.Always consult compatibility charts for lubricants and cleaning agents with Buna-N to prevent material degradation.
Forcing the O-ring into the groove, causing damage.Use appropriate tools and techniques to gently seat the O-ring, ensuring it is not stretched or pinched during installation.

Common Applications

  • Hydraulic and pneumatic systems
  • Automotive fuel systems
  • General industrial fluid sealing

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, UV, or weathering.
  • Avoid exposure to ketones, esters, and certain chlorinated hydrocarbons.

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 Polycarbonate.

Q: What are the main applications?

A: Hydraulic and pneumatic systems, Automotive fuel systems, General industrial fluid sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.799"CS = 0.078"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.