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

Industrial Buna-N O-Ring | Brass Fitting Seal | 1.325" ID

Expert Overview

Engineered for robust sealing in demanding industrial applications, this Buna-N O-ring offers superior chemical resistance and durability. Designed to fit brass fittings, it provides a reliable barrier against leaks and contamination.

StandardISO 9001
MaterialBrass
FinishZinc Plated
GradeN/A
Inside Diameter1.325"
Outside Diameter6.975"
Cross Section0.100"

Detailed Engineering Specifications

Precision-manufactured to tight tolerances, this industrial O-ring features an inside diameter of 1.325 inches, an outside diameter of 6.975 inches, and a cross-section of 0.100 inches. Constructed from high-grade Buna-N (Nitrile Butadiene Rubber), it exhibits excellent resistance to oils, fuels, hydraulic fluids, and many other chemicals. The brass material compatibility makes it ideal for use in brass fittings and connectors, ensuring a secure and long-lasting seal under moderate pressure and temperature conditions.

🧊 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 mating surfaces of the brass fitting and groove are clean and free from debris. 2. Carefully stretch the O-ring over the fitting or into the groove, avoiding overstretching. 3. Verify the O-ring is properly seated and not twisted within its groove before assembly. 4. Assemble the mating component, applying even pressure to compress the O-ring and create a seal.

Equivalent Standards (Cross-Reference)

Standard SystemDesignation
ISO EquivalentISO 9001:2015 Mfg
DIN EquivalentIndustry Standard
Primary StandardISO 9001

Mechanical Properties

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

Chemical Composition

Copper (Cu)60.0 - 63.0%
Zinc (Zn)Balance
Lead (Pb)2.5 - 3.7%

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
Overtightening the fitting, leading to O-ring extrusion or damage.Tighten fittings to the manufacturer's recommended torque specification or until a secure seal is achieved without excessive force.
Using the wrong O-ring material for the fluid or environment.Confirm the Buna-N material's compatibility with the specific chemicals and operating temperatures before installation.
Allowing the O-ring to become contaminated with dirt or grit during installation.Handle O-rings with clean hands and in a clean environment. Inspect mating surfaces for cleanliness before assembly.

Common Applications

  • Hydraulic systems with brass fittings
  • Pneumatic equipment
  • Fuel and oil transfer lines

⚠️ Engineering Warnings

  • Not suitable for high-temperature applications above 250°F (121°C).
  • Avoid exposure to strong oxidizing acids, ketones, and 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 Brass.

Q: What are the main applications?

A: Hydraulic systems with brass fittings, Pneumatic equipment, Fuel and oil transfer lines.

Technical Schematic

O-RING SEAL DIAGRAMAS568 Standard ConfigurationID = 1.325"CS = 0.100"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.