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

Buna-N Industrial O-Ring | 316 SS | 0.809" ID x 4.289" OD

Expert Overview

This industrial O-ring, constructed from robust Buna-N and housed in 316 stainless steel, delivers exceptional sealing performance. Engineered for demanding environments, it ensures reliable containment of fluids and gases.

StandardASME B18
Material316 Stainless Steel
FinishAnodized
GradeN/A
Inside Diameter0.809"
Outside Diameter4.289"
Cross Section0.252"

Detailed Engineering Specifications

Purpose-built for heavy-duty applications, this Buna-N O-ring features a precisely machined 316 stainless steel housing for superior corrosion resistance and structural integrity. The inside diameter is 0.809 inches, the outside diameter is 4.289 inches, and the cross-section measures 0.252 inches. This configuration makes it ideal for high-pressure hydraulic systems, chemical processing equipment, and general industrial machinery where reliable, long-lasting sealing is paramount. The Buna-N compound offers excellent resistance to oils, fuels, and general chemicals, while the 316 stainless steel provides a robust barrier against harsh operating conditions and wear.

🧊 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. Inspect the groove and mating surfaces for cleanliness and absence of debris. 2. Carefully place the O-ring into the designated groove, ensuring it is not twisted. 3. Apply a light, compatible lubricant if recommended for the specific application to facilitate installation and prevent damage.

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 during installation, leading to compression set and premature failure.Install with appropriate torque specifications, avoiding excessive compression which can permanently deform the O-ring.
Using incompatible lubricants or cleaning agents that degrade the Buna-N material.Consult material compatibility charts and use only approved lubricants and cleaning solutions for Buna-N.

Common Applications

  • Hydraulic and Pneumatic Systems
  • Chemical Processing Equipment
  • Automotive and Aerospace Components

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications exceeding Buna-N's operational limits.
  • Ensure compatibility with specific media being sealed; Buna-N has limitations with certain aggressive chemicals and solvents.

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 and Pneumatic Systems, Chemical Processing Equipment, Automotive and Aerospace Components.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.809"CS = 0.252"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.