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

Buna-N O-Ring | 0.307" ID x 0.525" OD | Polycarbonate

Expert Overview

This robust Buna-N O-ring, crafted from high-performance polycarbonate, offers exceptional sealing capabilities. Its precise dimensions ensure a secure fit in demanding industrial applications requiring fluid and gas containment.

StandardASME B18
MaterialPolycarbonate
FinishAnodized
GradeN/A
Inside Diameter0.307"
Outside Diameter0.525"
Cross Section0.258"

Detailed Engineering Specifications

Engineered for reliability and performance, this industrial O-ring boasts an inside diameter of 0.307 inches, an outside diameter of 0.525 inches, and a cross-section of 0.103 inches. Manufactured from Buna-N (Nitrile Butadiene Rubber) for excellent resistance to oils, fuels, and many hydraulic fluids, this material provides a broad operating temperature range and good abrasion resistance. The polycarbonate material used in its construction offers enhanced chemical inertness and mechanical strength, making it suitable for a wide array of static and dynamic sealing applications where standard rubber may degrade.

🧊 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. Clean sealing grooves and mating surfaces thoroughly to remove any debris or contaminants. 2. Inspect the O-ring for any damage or defects before installation. 3. Carefully install the O-ring into the designated groove, ensuring it is seated properly without twisting or stretching.

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
Overtightening fasteners that compress the O-ring beyond its elastic limit.Utilize torque wrenches to ensure proper clamping force, allowing the O-ring to maintain its sealing integrity without permanent deformation.
Using an O-ring made of incompatible material for the fluid or operating temperature.Always consult material compatibility charts and product specifications to select the correct O-ring material for the specific application environment.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • Fluid power equipment
  • General industrial sealing

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing acids or ketones.
  • Avoid prolonged exposure to UV radiation or ozone, 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 Polycarbonate.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic systems, Fluid power equipment, General industrial sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.307"CS = 0.258"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.