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

Buna-N O-Ring | 7.82" ID x 3.138" OD | Carbon Steel

Expert Overview

This industrial Buna-N O-ring, crafted from robust carbon steel, offers superior sealing performance in high-pressure and chemically aggressive environments. Its precise dimensions ensure a reliable fit for critical applications.

StandardASTM A106
MaterialCarbon Steel
FinishAnodized
GradeN/A
Inside Diameter7.820"
Outside Diameter3.138"
Cross Section0.181"

Detailed Engineering Specifications

Designed for demanding industrial environments, this Buna-N O-ring features a nominal inside diameter of 7.820 inches, an outside diameter of 3.138 inches, and a cross-section of 0.181 inches. The carbon steel construction provides exceptional mechanical strength and resistance to abrasion, making it ideal for applications involving oils, fuels, and hydraulic fluids. Buna-N (Nitrile) exhibits excellent resilience and a broad operating temperature range, ensuring consistent sealing integrity under rigorous conditions. Its chemical compatibility makes it suitable for a wide array of manufacturing and processing industries.

🧊 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 grooves are clean, dry, and free of burrs or sharp edges. 2. Carefully place the O-ring into the groove, avoiding stretching or twisting. 3. Apply a thin layer of compatible lubricant if recommended for the specific application to facilitate installation and prevent damage.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASTM A106

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 of fasteners, leading to excessive O-ring compression and extrusion.Adhere to specified torque values for all fasteners to ensure proper sealing without damaging the O-ring.
Using incompatible lubricants or cleaning agents that degrade the Buna-N material.Consult material compatibility charts and use only lubricants and cleaning agents specifically approved for Buna-N.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Fluid Power Equipment
  • Chemical Processing Equipment

⚠️ Engineering Warnings

  • Not recommended for use with ozone, UV, or weathering.
  • Avoid exposure to strong oxidizing agents, esters, ketones, and chlorinated hydrocarbons.

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, Chemical Processing Equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.820"CS = 0.181"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.