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

Industrial Buna-N O-Ring | Carbon Steel | 7.032" ID x 0.740" OD

Expert Overview

This industrial O-ring, crafted from Buna-N with a carbon steel core, provides superior sealing performance in high-pressure and corrosive applications. Engineered for longevity and reliability.

StandardASME B18
MaterialCarbon Steel
FinishZinc Plated
GradeN/A
Inside Diameter7.032"
Outside Diameter0.740"
Cross Section0.242"

Detailed Engineering Specifications

Designed for demanding industrial environments, this Buna-N O-ring features a robust carbon steel core for enhanced structural integrity and chemical resistance. Its precisely manufactured dimensions, including an Inside Diameter of 7.032 inches, an Outside Diameter of 0.740 inches, and a Cross Section of 0.242 inches, ensure a tight and leak-proof seal against a wide range of fluids and gases. The Buna-N material offers excellent resistance to petroleum-based oils, hydraulic fluids, and certain solvents, making it ideal for applications in automotive, aerospace, manufacturing, and general industrial machinery.

🧊 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 of debris. 2. Carefully lubricate the O-ring with a compatible lubricant to facilitate installation and prevent damage. 3. Gently place the O-ring into the groove, ensuring it is seated evenly and without twisting.

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening during assembly, causing extrusion or permanent deformation of the O-ring.Tighten fasteners to the manufacturer's recommended torque specifications to avoid over-compression.
Using incompatible lubricants or cleaning agents that can degrade the Buna-N material.Always consult material compatibility charts and use only lubricants and cleaning agents specifically recommended for Buna-N.

Common Applications

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

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications exceeding 250°F (121°C).
  • Avoid exposure to ozone, UV light, and strong oxidizing agents.

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 cylinders, Fluid power equipment, Fuel and oil handling.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 7.032"CS = 0.242"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.