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Buna-N Industrial O-Ring | 3.175" ID x 6.986" OD

Expert Overview

This high-performance Buna-N industrial O-ring offers exceptional sealing capabilities. Engineered with precise dimensions and robust material, it ensures reliability in demanding industrial environments.

StandardASME B18
MaterialNylon
FinishPlain
GradeN/A
Inside Diameter3.175"
Outside Diameter6.986"
Cross Section0.080"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this Buna-N (Nitrile Butadiene Rubber) O-ring boasts an Inside Diameter (ID) of 3.175 inches, an Outside Diameter (OD) of 6.986 inches, and a Cross Section (CS) of 0.080 inches. Buna-N provides excellent resistance to oils, fuels, hydraulic fluids, and many common solvents, making it ideal for a wide range of static and dynamic sealing applications. Its operating temperature range typically spans from -40°F to +257°F (-40°C to +125°C), offering consistent performance in moderate to high-pressure systems. This material is a cost-effective choice for general-purpose sealing where chemical and thermal resistance are paramount.

🧊 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:N/A

Installation Procedure

1. Ensure mating surfaces are clean, dry, and free of burrs or debris. 2. Lubricate the O-ring and mating groove lightly with a compatible lubricant (e.g., silicone grease). 3. Carefully install the O-ring into the groove, avoiding stretching or 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

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 the wrong lubricant, which can degrade the Buna-N material.Always consult compatibility charts or use a lubricant specifically recommended for Buna-N seals.
Overtightening fasteners, which can over-compress and damage the O-ring.Adhere to specified torque values for the assembly to prevent premature seal failure.

Common Applications

  • Hydraulic cylinders and actuators
  • Automotive fuel systems and power steering
  • Pumps, valves, and general machinery sealing

⚠️ Engineering Warnings

  • Not recommended for use with ozone, ketones, esters, or chlorinated hydrocarbons.
  • Ensure O-ring is compatible with the specific fluid and operating temperature of the application.

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 Nylon.

Q: What are the main applications?

A: Hydraulic cylinders and actuators, Automotive fuel systems and power steering, Pumps, valves, and general machinery sealing.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.175"CS = 0.080"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.