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

Industrial O-Ring | Buna-N | Carbon Steel | 4.925" ID

Expert Overview

This industrial O-ring, constructed from durable Buna-N and housed within a robust carbon steel casing, is engineered for superior sealing performance in demanding industrial settings. Its precise dimensions ensure a tight, leak-proof seal.

StandardASME B18
MaterialCarbon Steel
FinishAnodized
GradeN/A
Inside Diameter4.925"
Outside Diameter8.591"
Cross Section0.154"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this industrial O-ring features an Inside Diameter of 4.925 inches, an Outside Diameter of 8.591 inches, and a Cross Section of 0.154 inches. The Buna-N (Nitrile) elastomer offers excellent resistance to oils, fuels, and general hydraulic fluids, making it ideal for dynamic and static sealing applications. The carbon steel housing provides enhanced structural integrity and rigidity, further improving sealing capability under high pressure and extreme operational 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 the sealing groove and O-ring are clean and free of debris. 2. Carefully inspect the O-ring for any damage or defects. 3. Gently install the O-ring into the groove, avoiding stretching or twisting.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

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
Overtightening fasteners, which can deform the O-ring and its housing.Tighten fasteners to the manufacturer's specified torque values.
Using incompatible cleaning solvents that degrade the Buna-N material.Consult a chemical compatibility chart to select appropriate cleaning agents.

Common Applications

  • Hydraulic systems
  • Pneumatic cylinders
  • Fluid power equipment

⚠️ Engineering Warnings

  • Not recommended for use with strong oxidizing acids or polar solvents.
  • Temperature range limitations apply; consult material specifications for precise operating envelope.

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 cylinders, Fluid power equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.925"CS = 0.154"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.