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Industrial O-Ring, Buna-N, Carbon Steel, 7.426" ID

Expert Overview

Engineered for critical sealing, this Buna-N O-ring offers exceptional resistance to oils, fuels, and hydraulic fluids. Its robust carbon steel construction ensures durability in high-pressure, demanding industrial environments.

StandardISO 9001
MaterialCarbon Steel
FinishPassivated
GradeN/A
Inside Diameter7.426"
Outside Diameter2.486"
Cross Section0.136"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this industrial O-ring features a precise Inside Diameter of 7.426 inches, an Outside Diameter of 2.486 inches, and a Cross Section of 0.136 inches. Manufactured from Buna-N (Nitrile butadiene rubber), it provides excellent resistance to petroleum-based oils, greases, hydraulic fluids, and water. The carbon steel component, while not typically the primary sealing material of an O-ring itself, likely refers to a supporting component or a specific grade of Buna-N compound with enhanced structural integrity or compatibility. This combination makes it ideal for static and dynamic sealing in hydraulic cylinders, pumps, pneumatic actuators, and general industrial machinery where chemical resilience and mechanical strength are paramount.

🧊 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:Yes

Installation Procedure

1. Ensure the groove is clean, free of debris, and within specified tolerances. 2. Lightly lubricate the O-ring and groove with a compatible lubricant. 3. Carefully install the O-ring into the groove, avoiding stretching or twisting. 4. Verify proper seating and absence of pinching.

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

Chemical Composition

Carbon (C)0.28 - 0.55%
Manganese (Mn)0.60 - 0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.05% max

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.Consult chemical compatibility charts and use lubricants specifically recommended for Buna-N.
Overstretching the O-ring during installation, leading to premature failure.Install the O-ring with minimal stretch, ensuring it fits snugly within the groove without deformation.
Installing into a dirty or damaged groove, causing leaks or rapid wear.Thoroughly inspect and clean the groove before installation. Address any burrs or damage.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Automotive Seals
  • Industrial Pumps

⚠️ Engineering Warnings

  • Not suitable for applications involving ozone, strong acids, or ketones.
  • Operating temperature range must be respected to maintain sealing 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 Carbon Steel.

Q: What are the main applications?

A: Hydraulic Systems, Pneumatic Actuators, Automotive Seals, Industrial Pumps.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.426"CS = 0.136"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.