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948317 - ESAB NBR O-Ring 0.239 ID x 0.051 CS - 70A Hardness

Packaging: pack of 1
$3.64/EA $2.38/pack of 1 only $2.38/EASave 35%

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OVERVIEW

Precision NBR Sealing Component

The ESAB 948317 O-Ring is a critical maintenance component designed to restore the sealing integrity of your industrial and welding equipment. Manufactured from high-grade Nitrile Butadiene Rubber (NBR), this O-ring provides an excellent balance of mechanical properties and chemical resistance. NBR is the industry standard for sealing applications involving oils, fuels, and water, making it highly versatile for various machinery parts.

With a Shore A hardness of 70 (70A), this O-ring offers the ideal stiffness to resist extrusion while remaining flexible enough to conform to mating surfaces for a gas-tight seal. The dimensions are precision-molded to an Inner Diameter (ID) of 0.239 inches and a Cross Section (CS) of 0.051 inches. Accurate tolerancing ensures that the O-ring seats correctly in the gland, preventing bypass leakage that could compromise equipment performance or safety.

As a genuine ESAB replacement part, this component meets strict OEM specifications. Using authentic parts for repairs guarantees compatibility and longevity, reducing the frequency of maintenance intervals. Whether used in gas regulators, torch connections, or internal machine fluid paths, this O-ring delivers consistent performance under standard operating pressures and temperatures.

Technical specifications include:

  • Material: Nitrile (NBR)
  • Hardness: 70 Durometer (Shore A)
  • Inner Diameter: 0.239"
  • Cross Section: 0.051"
Additional Information
Packaging Description:1 Per Ea, pack of 1
Material:NBR (Nitrile)
Inner Diameter:0.239 in
Cross Section:0.051 in
Material Type:Nitrile Butadiene Rubber
----- new values below ----
Inner Diameter:0.239 in
Cross Section:0.051 in
Durometer:70A
Material Type:Nitrile Butadiene Rubber
Brand:ESAB
Material:NBR (Nitrile)
Packaging Description:1 Per Ea

INCLUDED

  • 1 x O-Ring (0.239 ID x .051 CS)

APPLICATIONS

  • Sealing gas connections in welding regulators and flowmeters
  • Replacement seal for welding torch heads and back caps
  • Internal sealing for wire feeder mechanisms
  • General pneumatic and hydraulic sealing applications requiring NBR compatibility
  • Repairing leaks in ESAB welding systems

FAQ

This O-ring is made from Nitrile Butadiene Rubber (NBR), also known as Buna-N.

The O-ring has an Inner Diameter (ID) of 0.239 inches and a Cross Section (CS) or thickness of 0.051 inches.

It has a durometer of 70A (Shore A), which is the standard hardness for most general-purpose sealing applications.

Yes, this is a genuine ESAB replacement part, ensuring correct fit and material specifications for your equipment.

Inspect the O-ring for signs of cracking, flattening (permanent set), cuts, or brittleness. If it feels hard or looks damaged, it should be replaced to prevent leaks.

While NBR is compatible with many gases, always check your equipment manual. For high-pressure oxygen service, specific cleaning and materials (like Viton) are often required to prevent combustion hazards.

NBR has excellent resistance to petroleum-based oils, fuels, water, and hydraulic fluids. It is not recommended for ketones (like acetone) or ozone exposure.

No, O-rings are size-specific. You must match the part number or the exact dimensions (0.239" x 0.051") to your equipment's requirements.