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Buna-N Industrial O-Ring - 7.100" ID, 3.150" OD

Expert Overview

This industrial O-ring, crafted from Buna-N, provides robust sealing for critical applications. Its precise dimensions ensure a secure fit and reliable performance in systems requiring exceptional durability and chemical resistance.

StandardDIN 933
MaterialCarbon Steel
FinishGalvanized
GradeN/A
Inside Diameter7.100"
Outside Diameter3.150"
Cross Section0.180"

Detailed Engineering Specifications

A high-performance industrial component, this Buna-N O-ring is engineered for demanding sealing applications. Featuring an inside diameter of 7.100 inches, an outside diameter of 3.150 inches, and a cross-section of 0.180 inches, it offers a precise fit for established groove dimensions. The Buna-N (Nitrile) material provides excellent resistance to oils, fuels, hydraulic fluids, and many solvents, making it suitable for a wide range of industrial machinery, hydraulic systems, and pneumatic equipment where moderate temperatures and exposure to non-aromatic hydrocarbons are common.

🧊 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. Clean and inspect the mating groove and sealing surfaces to ensure they are free of debris, burrs, and damage. 2. Lightly lubricate the O-ring and groove with a compatible lubricant to prevent tearing and facilitate insertion. 3. Carefully install the O-ring into the groove, ensuring it sits flush and is not twisted.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening or excessive compression during installation.Ensure the O-ring is seated properly within its groove and avoid over-compressing, which can lead to premature wear and sealing failure.
Using incompatible lubricants or cleaning agents.Always consult a chemical compatibility chart for Buna-N to select lubricants and cleaning agents that will not degrade the elastomer.

Common Applications

  • Hydraulic and pneumatic cylinders
  • Fluid power systems
  • Automotive fuel systems

⚠️ Engineering Warnings

  • Not suitable for use with ozone, ketones, esters, or highly polar solvents.
  • Operating temperature range should be strictly adhered to for optimal performance and lifespan.

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 and pneumatic cylinders, Fluid power systems, Automotive fuel systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.100"CS = 0.180"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.