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Buna-N O-Ring, 0.390" ID x 10.092" OD, Carbon Steel Back-up

Expert Overview

This industrial O-ring, constructed with a Buna-N sealing element and a robust carbon steel backup, offers exceptional durability and reliable sealing. Engineered for performance in demanding environments, it ensures leak-free operation across a wide range of applications.

StandardDIN 933
MaterialCarbon Steel
FinishZinc Plated
GradeN/A
Inside Diameter0.390"
Outside Diameter10.092"
Cross Section0.107"

Detailed Engineering Specifications

A high-performance industrial component, this Buna-N O-ring features a precise inside diameter of 0.390 inches and an outside diameter of 10.092 inches, with a consistent cross-section of 0.107 inches. The Buna-N material provides excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for dynamic and static sealing applications. The integrated carbon steel backup ring enhances structural integrity, preventing extrusion under high pressure and temperature conditions. This combination ensures extended service life and superior sealing performance in critical 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 mating groove surfaces are clean, dry, and free from debris or damage. 2. Carefully install the O-ring into its designated groove, avoiding any stretching or twisting. 3. Apply a light lubricant compatible with Buna-N if necessary to facilitate installation and prevent initial damage.

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
Stretching the O-ring during installation.Install the O-ring without excessive stretching to maintain its original dimensions and sealing capability.
Using incompatible lubricants.Always use lubricants specifically recommended for Buna-N materials to prevent degradation and premature failure.

Common Applications

  • Hydraulic systems
  • Pneumatic actuators
  • Fluid power equipment
  • Fuel and oil handling

⚠️ Engineering Warnings

  • Avoid exposure to ozone, UV, and weathering, as Buna-N has limited resistance.
  • Do not use in applications involving strong acids, ketones, or esters, which can degrade Buna-N.

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 actuators, Fluid power equipment, Fuel and oil handling.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.390"CS = 0.107"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.