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

Buna-N Industrial O-Ring | 1.274" ID x 1.255" OD

Expert Overview

This industrial O-ring, crafted from durable Buna-N, ensures exceptional sealing performance. Designed for critical applications, its precise dimensions guarantee a tight, leak-free fit.

StandardDIN 933
MaterialNylon
FinishGalvanized
GradeN/A
Inside Diameter1.274"
Outside Diameter1.255"
Cross Section0.245"

Detailed Engineering Specifications

Built to exacting engineering tolerances, this Buna-N O-ring features an Inside Diameter of 1.274 inches, an Outside Diameter of 1.255 inches, and a Cross Section of 0.245 inches. The Buna-N (Nitrile Butadiene Rubber) material provides excellent resistance to petroleum-based oils, hydraulic fluids, and many solvents, making it ideal for high-pressure systems, pneumatic actuators, and general fluid power applications where chemical compatibility and consistent sealing are paramount. Its robust construction ensures longevity and reliability under operational stress.

🧊 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:N/A

Installation Procedure

1. Ensure the groove and mating surfaces are clean and free from debris. 2. Carefully stretch the O-ring over the component, avoiding any twisting or overstretching. 3. Gently seat the O-ring into its designated groove, verifying it is fully contained and not pinched.

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

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
Using an O-ring with incorrect dimensions for the groove, leading to leaks or premature failure.Always verify the O-ring's inside diameter, outside diameter, and cross-section precisely match the groove specifications.
Overtwisting or overstretching the O-ring during installation, causing damage and compromising seal integrity.Install the O-ring without excessive stretching or twisting, ensuring it sits evenly within the groove.
Installing the O-ring into a contaminated groove, which can lead to abrasion and sealing issues.Thoroughly clean the groove and all mating surfaces before O-ring installation.

Common Applications

  • Hydraulic Systems
  • Pneumatic Actuators
  • Automotive Seals

⚠️ Engineering Warnings

  • Not suitable for use with ozone, ketones, esters, or chlorinated hydrocarbons.
  • Avoid prolonged exposure to direct sunlight and UV radiation 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 Nylon.

Q: What are the main applications?

A: Hydraulic Systems, Pneumatic Actuators, Automotive Seals.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 1.274"CS = 0.245"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.