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

Industrial Buna-N O-Ring | Carbon Steel | 7.243" ID x 8.558" OD

Expert Overview

This industrial-grade Buna-N O-ring, constructed from robust carbon steel, provides exceptional sealing performance. Its precise dimensions ensure a secure fit in critical applications, offering reliability and durability.

StandardASME B18
MaterialCarbon Steel
FinishBlack Oxide
GradeN/A
Inside Diameter7.243"
Outside Diameter8.558"
Cross Section0.255"

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this Buna-N O-ring is engineered for superior sealing performance in demanding industrial environments. Its precise dimensions include an Inside Diameter (ID) of 7.243 inches, an Outside Diameter (OD) of 8.558 inches, and a Cross Section (CS) of 0.255 inches. The Buna-N material offers excellent resistance to oils, fuels, and hydraulic fluids, while the carbon steel construction provides inherent strength and chemical stability, making it suitable for a wide range of static and dynamic sealing applications.

🧊 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 is clean, free of debris, and properly machined according to specifications. 2. Carefully lubricate the O-ring and the groove with a compatible lubricant to prevent tearing and ease installation. 3. Install the O-ring by gently stretching it into the groove, avoiding excessive force or sharp tools.

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
Using excessive force during installation, leading to O-ring damage.Employ proper lubrication and a gentle stretching technique. Avoid sharp installation tools.
Installing into a dirty or damaged groove, compromising the seal.Thoroughly clean and inspect the mating groove for any imperfections or debris before installation.

Common Applications

  • Hydraulic systems
  • Pneumatic actuators
  • Automotive sealing components

⚠️ Engineering Warnings

  • Not suitable for applications involving high concentrations of ozone, ketones, or esters.
  • Verify compatibility with specific operating temperatures and chemical environments before deployment.

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, Automotive sealing components.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.243"CS = 0.255"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.