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

Buna-N O-Ring 2.627" ID x 4.499" OD x 0.137" CS

Expert Overview

This robust Buna-N O-ring provides superior sealing in demanding industrial applications. Engineered for reliability, its specific dimensions ensure a precise fit and dependable performance in various operational settings.

StandardISO 9001
MaterialPolycarbonate
FinishBlack Oxide
GradeN/A
Inside Diameter2.627"
Outside Diameter4.499"
Cross Section0.137"

Detailed Engineering Specifications

Specified by design engineers worldwide, this industrial O-ring boasts a precise Inside Diameter of 2.627 inches, an Outside Diameter of 4.499 inches, and a Cross Section of 0.137 inches. Constructed from Buna-N (Nitrile Butadiene Rubber), it offers excellent resistance to oils, fuels, and many hydraulic fluids. This material also exhibits good abrasion resistance and a wide operating temperature range, making it suitable for static and dynamic sealing in pumps, valves, cylinders, and fluid power 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 is clean and free of debris. 2. Lightly lubricate the O-ring and groove with a compatible lubricant. 3. Carefully install the O-ring into the groove, avoiding any stretching or twisting.

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 / ExposedModerate
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Using the wrong lubricant, which can degrade Buna-N.Always use a lubricant specified as compatible with Buna-N materials.
Overstretching the O-ring during installation, leading to premature failure.Install the O-ring without excessive stretching; ensure it fits snugly but without strain.

Common Applications

  • Hydraulic Systems
  • Pneumatic Cylinders
  • Fuel and Oil Lines
  • Pumps and Valves

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing acids or ketones.
  • Avoid prolonged exposure to direct sunlight or ozone.

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 Cylinders, Fuel and Oil Lines, Pumps and Valves.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 2.627"CS = 0.137"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.