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Buna-N O-Ring, 3.475" OD, 316 SS - Industrial Sealing

Expert Overview

This industrial-grade Buna-N O-ring, constructed with superior 316 stainless steel, offers exceptional sealing performance. Its precise dimensions ensure reliable operation in demanding environments.

StandardASME B18
Material316 Stainless Steel
FinishPassivated
GradeN/A
Inside Diameter0.205"
Outside Diameter3.475"
Cross Section0.100"

Detailed Engineering Specifications

Manufactured under strict quality controls, this Buna-N O-ring features an inside diameter of 0.205 inches, an outside diameter of 3.475 inches, and a 0.100-inch cross-section. The Buna-N (Nitrile) elastomer provides excellent resistance to oils, fuels, and many hydraulic fluids. The 316 stainless steel construction offers superior corrosion resistance, making it suitable for harsh chemical or marine environments. This combination ensures a robust and long-lasting seal in a wide array of industrial machinery and equipment.

🧊 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 sealing groove is clean and free of debris. 2. Carefully stretch the O-ring over the smaller component or into the groove, avoiding excessive force or sharp tools. 3. Gently seat the O-ring within the groove, ensuring no twisting or pinching occurs before assembly of mating parts.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardASME B18

Mechanical Properties

Tensile Strength75,000 psi (515 MPa)
Yield Strength30,000 psi (205 MPa)
Elongation in 2 in.40% min
HardnessRockwell B95 max

Chemical Composition

Carbon (C)0.08% max
Chromium (Cr)16.0 - 18.0%
Nickel (Ni)10.0 - 14.0%
Molybdenum (Mo)2.0 - 3.0%

Temperature & Environment Rating

Min Operating Temp
-320°F (-195°C)
Max Continuous Temp
1500°F (815°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 / SaltwaterExcellent
Chemical / AcidicGood

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overtightening fasteners, which can over-compress and damage the O-ring.Tighten fasteners to the manufacturer's specified torque values to prevent over-compression.
Using sharp or abrasive tools during installation, which can nick or cut the O-ring.Utilize only non-metallic, rounded installation tools or adequate lubrication for smooth O-ring placement.
Selecting an O-ring material incompatible with the fluid or operating temperature.Verify the Buna-N material's compatibility with the specific application's chemical exposure and temperature range before installation.

Common Applications

  • Hydraulic Systems
  • Automotive Seals
  • Pneumatic Actuators
  • Chemical Processing Equipment
  • Marine Applications

⚠️ Engineering Warnings

  • Not suitable for exposure to ozone, UV, or weathering. Consider Viton or EPDM for these conditions.
  • Buna-N has limited resistance to strong acids, ketones, and certain esters. Verify chemical compatibility.

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 316 Stainless Steel.

Q: What are the main applications?

A: Hydraulic Systems, Automotive Seals, Pneumatic Actuators, Chemical Processing Equipment, Marine Applications.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.205"CS = 0.100"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.