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

3.769" Buna-N O-Ring | 316 SS | High-Temp Industrial Seal

Expert Overview

This industrial O-ring features durable Buna-N sealing material housed within a 316 stainless steel casing. Engineered for superior chemical resistance and high-pressure environments, it ensures dependable sealing performance.

StandardISO 9001
Material316 Stainless Steel
FinishGalvanized
GradeN/A
Inside Diameter3.769"
Outside Diameter4.493"
Cross Section0.248"

Detailed Engineering Specifications

Engineered for reliability and performance, this O-ring boasts an inside diameter of 3.769 inches, an outside diameter of 4.493 inches, and a precise 0.248-inch cross-section. The Buna-N elastomer provides excellent resistance to oils, fuels, and many hydraulic fluids, while the 316 stainless steel housing offers exceptional corrosion resistance and structural integrity in aggressive media and extreme temperatures. Its robust construction makes it ideal for demanding sealing applications in chemical processing, oil and gas, and heavy 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 sealing groove is clean, dry, and free of debris or sharp edges. 2. Carefully inspect the O-ring for any defects or damage before installation. 3. Gently install the O-ring into the groove, avoiding stretching or twisting. Lubrication with a compatible fluid may be beneficial for ease of installation and to prevent damage.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

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
Installing a damaged or defective O-ring.Thoroughly inspect the O-ring for nicks, cuts, or deformation before installation. Always use new, undamaged seals.
Stretching or twisting the O-ring during installation.Install the O-ring by working it into the groove evenly. If lubrication is used, apply it sparingly to prevent the O-ring from spinning or becoming distorted.
Using incompatible lubrication or cleaning agents.Consult the O-ring material compatibility chart to ensure any lubricant or cleaning agent used will not degrade the Buna-N or the 316 stainless steel.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • Chemical processing equipment
  • Automotive and aerospace components
  • Oil and gas exploration equipment

⚠️ Engineering Warnings

  • Ensure the O-ring material (Buna-N) is compatible with the specific fluids and operating temperatures of your application.
  • Do not exceed the recommended pressure limits for this O-ring configuration. Consult the datasheet for specific ratings.

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, Pneumatic systems, Chemical processing equipment, Automotive and aerospace components, Oil and gas exploration equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.769"CS = 0.248"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.