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

Buna-N O-Ring | 0.742" ID x 7.238" OD x 0.230" CS | Industrial Sealing

Expert Overview

This industrial O-ring, constructed from robust Buna-N with nylon reinforcement, provides superior sealing capabilities. Its precise dimensions ensure a tight fit in critical fluid and gas systems, offering exceptional durability and resistance.

StandardISO 9001
MaterialNylon
FinishZinc Plated
GradeN/A
Inside Diameter0.742"
Outside Diameter7.238"
Cross Section0.230"

Detailed Engineering Specifications

Engineered for reliability and performance, this industrial O-ring features a 0.742-inch inside diameter, a 7.238-inch outside diameter, and a 0.230-inch cross-section. The Buna-N material offers excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, while the integrated nylon reinforcement enhances its tensile strength and resistance to extrusion. This combination makes it ideal for high-pressure and demanding operational environments, ensuring a consistent and leak-free seal across a wide temperature range. Its chemical inertness and resilience contribute to extended service life in challenging industrial settings.

🧊 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, dry, and free from burrs or damage. 2. Lubricate the O-ring and the groove with a compatible lubricant to facilitate installation and prevent tearing. 3. Carefully position the O-ring within the groove, ensuring it is seated uniformly without twisting or stretching excessively.

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

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 excessive force or sharp tools during installation, leading to O-ring damage.Employ gentle pressure and use rounded installation tools specifically designed for O-rings.
Incorrectly lubricating the O-ring or using an incompatible lubricant.Always use a lubricant recommended for the specific O-ring material and application to avoid material degradation or seal failure.
Installing the O-ring without verifying the groove dimensions meet the O-ring specifications.Thoroughly inspect and measure the groove dimensions to ensure they are within the manufacturer's recommended tolerances for the specified O-ring.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Automotive fuel systems
  • Oil and gas exploration equipment

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents, ketones, or esters.
  • Operating temperature range must be observed to maintain seal integrity and material properties.

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 Nylon.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic cylinders, Automotive fuel systems, Oil and gas exploration equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.742"CS = 0.230"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.