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

Buna-N Carbon Steel O-Ring | 5.757" ID x 3.995" OD

Expert Overview

This industrial O-ring, crafted from robust Buna-N and a carbon steel core, delivers exceptional sealing performance. Designed for demanding environments, it ensures reliable containment of fluids and gases under pressure.

StandardISO 9001
MaterialCarbon Steel
FinishPassivated
GradeN/A
Inside Diameter5.757"
Outside Diameter3.995"
Cross Section0.190"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features a precise Inside Diameter of 5.757 inches, an Outside Diameter of 3.995 inches, and a 0.190-inch cross-section. The carbon steel core provides structural integrity and enhanced pressure resistance, while the Buna-N (Nitrile Butadiene Rubber) compound offers excellent resistance to oils, fuels, and many hydraulic fluids, making it suitable for a broad range of industrial sealing requirements. Its robust construction ensures longevity and dependable sealing in challenging 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 is clean, free of debris, and free of sharp edges. 2. Carefully stretch the O-ring over the component, avoiding excessive force or twisting. 3. Gently compress the O-ring into the groove, ensuring a uniform fit without 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
Overtightening or forcing the O-ring into a confined space.Handle the O-ring with care, using appropriate tools if necessary, to prevent nicks, cuts, or extrusion.
Using the wrong O-ring material for the fluid or temperature environment.Verify the chemical compatibility and temperature range of the Buna-N material against the application's media and operating conditions.

Common Applications

  • Hydraulic systems
  • Pneumatic equipment
  • Automotive applications
  • Industrial machinery

⚠️ Engineering Warnings

  • Not suitable for use with strong oxidizing agents, ketones, or esters.
  • Avoid prolonged exposure to direct sunlight or ozone, which can degrade the Buna-N material.

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 applications, Industrial machinery.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 5.757"CS = 0.190"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.