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

Buna-N O-Ring | 7.43" OD | 316 Stainless Steel

Expert Overview

This industrial O-ring, constructed from robust 316 stainless steel, offers exceptional sealing performance. Engineered for demanding environments, its precise dimensions ensure reliable containment and leak prevention in critical fluid and gas systems.

StandardDIN 933
Material316 Stainless Steel
FinishZinc Plated
GradeN/A
Inside Diameter4.464"
Outside Diameter7.430"
Cross Section0.081"

Detailed Engineering Specifications

A high-performance industrial component, this Buna-N O-ring is meticulously manufactured from premium 316 stainless steel, renowned for its superior corrosion resistance and mechanical strength. Featuring an inside diameter of 4.464 inches, an outside diameter of 7.430 inches, and a precise cross-section of 0.081 inches, it is designed to maintain optimal sealing integrity under challenging operating conditions. The 316 stainless steel construction ensures compatibility with a wide range of aggressive media and elevated temperatures, making it ideal for applications requiring robust and long-lasting sealing solutions in industries such as chemical processing, oil and gas, and heavy manufacturing.

🧊 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 is clean, free of debris, and properly dimensioned. 2. Lightly lubricate the O-ring and groove with a compatible lubricant. 3. Carefully install the O-ring into the groove, avoiding excessive stretching or twisting.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardDIN 933

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
Using the wrong lubricant or no lubricant at all.Always use a lubricant compatible with both the O-ring material and the media being sealed. A light application of a compatible grease or silicone lubricant can prevent damage during installation and ensure proper sealing.
Overtaxing the O-ring during installation by stretching it beyond its elastic limit.Install the O-ring without unnecessary stretching. If the O-ring feels too tight, verify the groove dimensions or consider a slightly larger O-ring if within tolerance. Avoid tools that can nick or cut the O-ring.

Common Applications

  • Hydraulic and pneumatic systems
  • Chemical processing equipment
  • Automotive and aerospace fluid handling

⚠️ Engineering Warnings

  • Buna-N is not suitable for exposure to ozone, UV light, or weathering.
  • Verify chemical compatibility with the specific fluid or gas being sealed.

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 fluid handling.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 4.464"CS = 0.081"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.