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Industrial O-Ring, Buna-N, 3.867" ID, 9.921" OD, Carbon Steel

Expert Overview

This robust industrial O-ring, crafted from Buna-N with a durable carbon steel core, ensures superior sealing in challenging environments. Designed for precise fit and long-term performance.

StandardDIN 933
MaterialCarbon Steel
FinishPlain
GradeN/A
Inside Diameter3.867"
Outside Diameter9.921"
Cross Section0.175"

Detailed Engineering Specifications

Engineered for reliability and performance, this Buna-N O-ring boasts an inside diameter of 3.867 inches and an outside diameter of 9.921 inches, with a precise 0.175-inch cross-section. The carbon steel construction provides exceptional mechanical strength and resistance to extrusion under high pressure. Buna-N (Nitrile Butadiene Rubber) offers excellent resistance to oils, fuels, and hydraulic fluids, making it ideal for a wide range of industrial applications where robust sealing is 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:Yes

Installation Procedure

1. Ensure the mating grooves are clean, free of debris, and properly lubricated. 2. Carefully compress the O-ring by hand or with appropriate tooling, ensuring it seats evenly within the groove. 3. Verify the O-ring is not twisted or pinched during assembly.

Equivalent Standards (Cross-Reference)

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

Mechanical Properties

Tensile StrengthStandard Commercial Spec
Yield StrengthStandard Commercial Spec
HardnessVaries by specific batch

Chemical Composition

Carbon (C)0.28 - 0.55%
Manganese (Mn)0.60 - 0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.05% max

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 excessive force or sharp tools that can nick or cut the O-ring.Employ hand installation whenever possible and use rounded, non-marring tools for assistance if necessary.
Installing the O-ring in a twisted or kinked position.Ensure the O-ring lies flat and evenly within its groove before final assembly.

Common Applications

  • Hydraulic systems
  • Pneumatic systems
  • Oil and fuel handling equipment

⚠️ Engineering Warnings

  • Not suitable for use with strong acids, ketones, or certain polar solvents.
  • Ensure compatibility of fluid and operating temperature range with Buna-N material properties.

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 Carbon Steel.

Q: What are the main applications?

A: Hydraulic systems, Pneumatic systems, Oil and fuel handling equipment.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 3.867"CS = 0.175"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.