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

Buna-N O-Ring | 0.826" ID x 4.826" OD | Carbon Steel

Expert Overview

This industrial O-ring, crafted from robust Buna-N (Nitrile) with a carbon steel core, offers exceptional sealing performance. Its precise dimensions ensure a secure fit for critical applications.

StandardASME B18
MaterialCarbon Steel
FinishZinc Plated
GradeN/A
Inside Diameter0.826"
Outside Diameter4.826"
Cross Section0.178"

Detailed Engineering Specifications

Trusted by engineers across multiple sectors, this Buna-N O-ring (Nitrile Rubber) features a 0.826-inch inside diameter, a 4.826-inch outside diameter, and a 0.178-inch cross-section. The carbon steel core provides enhanced structural integrity and rigidity. Buna-N is renowned for its excellent resistance to oils, fuels, hydraulic fluids, and abrasive wear, making it ideal for static and dynamic sealing applications in moderate temperature ranges. Its robust composition ensures long-term durability and reliable performance under pressure.

🧊 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, dry, and free from burrs or sharp edges. 2. Carefully place the O-ring into its designated groove, avoiding stretching or twisting. 3. Confirm the O-ring is seated evenly and without damage before assembling the mating component.

Equivalent Standards (Cross-Reference)

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

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 / ExposedExcellent
Marine / SaltwaterNot Recommended
Chemical / AcidicNot Recommended

Common Mistakes & How to Avoid Them

❌ Mistake✅ Correct Approach
Overstretching the O-ring during installation.Gently flex the O-ring to fit into the groove, minimizing any excessive tension to prevent premature failure.
Installing on a contaminated or damaged groove surface.Thoroughly clean and inspect the groove for any debris, sharp edges, or imperfections that could compromise the seal.

Common Applications

  • Hydraulic systems
  • Automotive fuel systems
  • Industrial machinery seals

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications exceeding 250°F (121°C).
  • Avoid exposure to strong oxidizing agents, ketones, or esters, which can degrade Buna-N.

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, Automotive fuel systems, Industrial machinery seals.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 0.826"CS = 0.178"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.