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

Buna-N O-Ring - 3.424" ID x 7.925" OD x 0.083" CS

Expert Overview

This industrial O-ring, manufactured from robust Buna-N, ensures reliable sealing in critical applications. Its precise dimensions provide a secure fit, preventing leaks and maintaining system integrity under pressure.

StandardDIN 933
MaterialPolycarbonate
FinishZinc Plated
GradeN/A
Inside Diameter3.424"
Outside Diameter7.925"
Cross Section0.083"

Detailed Engineering Specifications

Designed for demanding industrial environments, this Buna-N O-ring features an inside diameter of 3.424 inches, an outside diameter of 7.925 inches, and a cross-section of 0.083 inches. Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to petroleum-based oils, hydraulic fluids, and a broad range of chemicals, making it ideal for applications exposed to these substances. Its resilience and elasticity contribute to long-lasting, leak-free performance in pumps, valves, and hydraulic systems.

🧊 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 surfaces are clean and free from debris. 2. Carefully stretch the O-ring over the smaller diameter of the assembly or into the groove. 3. Gently roll or seat the O-ring into its designated groove, avoiding excessive stretching or twisting.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overstretching the O-ring during installation, leading to premature failure.Use appropriate installation tools and techniques to minimize stress on the O-ring. Install in sections if necessary and roll into the groove.
Installing on a damaged or dirty groove surface, compromising the seal.Thoroughly inspect and clean all groove surfaces before installation. Address any nicks, burrs, or corrosion.

Common Applications

  • Hydraulic cylinders
  • Pneumatic systems
  • Fuel and oil handling equipment
  • General industrial sealing

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, strong acids, or polar solvents.
  • Operating temperature range should be observed to maintain material integrity.

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 cylinders, Pneumatic systems, Fuel and oil handling equipment, General industrial sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.424"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.