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

Buna-N O-Ring | 7.797" ID x 3.299" OD | Carbon Steel

Expert Overview

This industrial O-ring, constructed from robust Buna-N (Nitrile) material, ensures reliable sealing in a wide range of industrial applications. Its precise dimensions and durable composition make it a cost-effective solution for critical fluid and gas containment.

StandardASME B18
MaterialCarbon Steel
FinishBlack Oxide
GradeN/A
Inside Diameter7.797"
Outside Diameter3.299"
Cross Section0.094"

Detailed Engineering Specifications

A proven choice for industrial professionals, this Buna-N O-ring is engineered for exceptional performance in challenging environments. With an inside diameter of 7.797 inches, an outside diameter of 3.299 inches, and a cross-section of 0.094 inches, it provides a precise fit for established groove dimensions. The Buna-N material offers excellent resistance to oils, fuels, and many hydraulic fluids, making it suitable for a broad spectrum of sealing duties in hydraulic and pneumatic systems, as well as general industrial equipment where moderate temperature and chemical exposure are present. Its carbon steel construction, while not typical for O-ring material itself, implies it may be a component *within* a larger carbon steel assembly or a specialized application where the O-ring's properties are complemented by the surrounding metal.

🧊 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 dimensioned for the O-ring's cross-section. 2. Lightly lubricate the O-ring and the groove with a compatible lubricant to prevent tearing and facilitate installation. 3. Carefully install the O-ring into the groove, avoiding stretching or twisting. Ensure it sits flush without any pinching.

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
Installing into a dirty or damaged groove.Thoroughly clean and inspect the groove for any nicks, burrs, or foreign material before installation.
Over-stretching or twisting the O-ring during installation.Use appropriate tools and techniques to gently seat the O-ring, ensuring it is not subjected to excessive tension or rotation.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • General fluid and gas sealing
  • Automotive components

⚠️ Engineering Warnings

  • Not suitable for exposure to ozone, UV, or weathering.
  • Avoid use with aggressive solvents and ketones 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 systems, General fluid and gas sealing, Automotive components.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.797"CS = 0.094"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.