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Buna-N Industrial O-Ring - 7.747" ID x 5.142" OD

Expert Overview

This industrial O-ring, crafted from durable Buna-N and reinforced with carbon steel, provides exceptional sealing integrity in demanding environments. Its precise dimensions ensure a reliable fit and long-lasting performance.

StandardISO 9001
MaterialCarbon Steel
FinishPassivated
GradeN/A
Inside Diameter7.747"
Outside Diameter5.142"
Cross Section0.103"

Detailed Engineering Specifications

Specified by design engineers worldwide, this industrial O-ring offers superior sealing capabilities due to its robust Buna-N material, renowned for its excellent resistance to oils, fuels, and hydraulic fluids. The carbon steel construction further enhances its mechanical strength and durability. The precise dimensions, with an Inside Diameter of 7.747 inches, an Outside Diameter of 5.142 inches, and a Cross Section of 0.103 inches, are critical for achieving a leak-proof seal in dynamic and static applications. This o-ring is engineered for reliable performance across a broad temperature range and under moderate pressure conditions.

🧊 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 mating surfaces are clean, dry, and free from debris. 2. Carefully position the O-ring within its designated groove, avoiding stretching or twisting. 3. Apply a light coat of compatible lubricant if necessary to facilitate assembly and prevent damage.

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 incorrect O-ring size for the groove.Always verify O-ring dimensions (ID, OD, CS) against the groove specifications before installation to ensure a proper fit and seal.
Stretching or twisting the O-ring during installation.Handle the O-ring gently and roll it into the groove. Avoid overstretching, which can lead to premature failure and leaks.

Common Applications

  • Hydraulic systems
  • Pneumatic equipment
  • Automotive seals
  • Fluid power applications
  • General industrial machinery

⚠️ Engineering Warnings

  • Not suitable for applications involving strong oxidizing agents or polar solvents.
  • Exposure to high temperatures beyond the material's rating can degrade performance and lead to failure.

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 equipment, Automotive seals, Fluid power applications, General industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.747"CS = 0.103"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.