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

Buna-N O-Ring | 3.913" ID x 6.199" OD | Carbon Steel

Expert Overview

This industrial O-ring, constructed from durable Buna-N and featuring a robust carbon steel core, provides reliable sealing in demanding environments. Its precise dimensions ensure a secure fit and optimal performance.

StandardDIN 933
MaterialCarbon Steel
FinishGalvanized
GradeN/A
Inside Diameter3.913"
Outside Diameter6.199"
Cross Section0.241"

Detailed Engineering Specifications

Manufactured under strict quality controls, this Buna-N O-ring is engineered for exceptional sealing performance. With an inside diameter of 3.913 inches, an outside diameter of 6.199 inches, and a precise 0.241-inch cross-section, it's designed for tight tolerances. The Buna-N material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it suitable for a wide range of industrial applications. The integrated carbon steel provides enhanced structural integrity and rigidity, crucial for high-pressure or high-vibration scenarios where standard elastomers may fail. It's ideal for static and dynamic sealing applications in pumps, valves, and hydraulic 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:Yes

Installation Procedure

1. Ensure the sealing groove is clean, dry, and free from debris. 2. Lightly lubricate the O-ring with a compatible lubricant (refer to material compatibility charts). 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 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
Using excessive force during installation, leading to nicks or cuts on the O-ring surface.Apply gentle pressure and utilize appropriate tools if necessary, ensuring the O-ring is seated correctly without damage.
Installing the O-ring into a dirty or damaged groove, compromising the seal's integrity.Thoroughly inspect and clean the groove before installation. Address any imperfections in the groove surface.

Common Applications

  • Hydraulic cylinder seals
  • Pump shaft seals
  • Valve stem seals
  • Pneumatic systems

⚠️ Engineering Warnings

  • Buna-N is not recommended for use with strong oxidizing acids, esters, ketones, or certain chlorinated hydrocarbons.
  • Ensure operating temperatures remain within the recommended range for Buna-N to prevent degradation.

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 cylinder seals, Pump shaft seals, Valve stem seals, Pneumatic systems.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.913"CS = 0.241"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.