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10Z25 - Western Enterprises C-66 Oxygen Nut, B-Size 9/16"-18 RH

Packaging: pack of 1
$48.17/EA $29.89/pack of 1 only $29.89/EASave 38%

Usually ships within 3-5 business days

SKU: ESB10Z25 Categories: ,

OVERVIEW

Precision Brass Connection for Oxygen Service

The Western Enterprises C-66 Oxygen Nut is a critical component for maintaining safe and efficient gas distribution systems in industrial welding and cutting applications. Manufactured to strict tolerances, this fitting is designed to facilitate the connection of oxygen hoses to regulators, torches, and manifold systems. The unit features a standard B-Size configuration with 9/16"-18 threads, ensuring broad compatibility with the vast majority of North American oxy-fuel equipment. As per Compressed Gas Association (CGA) standards, the threads are Right-Hand (RH), distinguishing them from fuel gas fittings to prevent dangerous cross-connections.

Constructed from high-grade free-machining brass, the C-66 nut offers excellent mechanical strength and resistance to corrosion and oxidation. Brass is the material of choice for oxygen service due to its non-sparking properties and compatibility with high-purity oxygen environments. The nut is designed to work in conjunction with a matching nipple (typically the C-67 series) to form a compression seal that is both gas-tight and vibration-resistant. The hexagonal outer profile allows for precise torque application using standard wrenches, ensuring a secure fit without deforming the sealing surfaces.

In professional MRO environments, maintaining a stock of C-66 nuts is essential for rapid repair of damaged hoses or the fabrication of custom hose assemblies. Whether upgrading existing equipment or replacing worn components, this nut provides the reliability required for high-pressure oxygen service. It is suitable for use in applications ranging from light-duty HVAC repair to heavy industrial steel fabrication.

Technical Specifications

  • Thread Specification: 9/16"-18 UNF-2B (Right Hand)
  • Connection Size: CGA "B" Size
  • Material Composition: Brass (UNS C36000 or equivalent)
  • Service Medium: Oxygen and inert gases requiring RH connections
  • Compliance: Meets CGA V-1 specifications for gas connections
Additional Information
Packaging Description:pack of 1
Gas Type:Oxygen
Thread Size:9/16"-18
Material:Brass
Connection Type:B-Size, Right Hand
Product Type:Hose Nut
Thread Direction:Right Hand (RH)
Pressure Rating:200 PSIG
----- new values below ----
Product Type:Hose Nut
Thread Direction:Right-Hand (RH)
Compatible Nipple:C-67, C-69
Pressure Rating:200 PSIG
Gas Type:Oxygen
Thread Size:9/16"-18
Material:Brass
Connection Type:B-Size, Right Hand

INCLUDED

  • (1) C-66 Oxygen Nut (B-Size, Right Hand)

APPLICATIONS

  • Oxy-Fuel Welding and Cutting
  • Hose Repair and Fabrication
  • Manifold Systems
  • HVAC Brazing Setups
  • Industrial Gas Distribution

FAQ

The C-66 nut has a 9/16"-18 thread size, commonly known as B-Size.

This nut is for Oxygen. It has Right-Hand threads. Fuel gas nuts (like Acetylene) have Left-Hand threads and usually feature a notch on the hex.

No, the C-66 is the nut only. You will need to purchase the corresponding nipple (such as the C-67) separately if you are building a hose connection.

It is machined from solid brass, which is standard for oxygen fittings due to its durability and non-sparking properties.

Yes, if your Victor torch uses standard B-size connections (which most do), this nut will fit perfectly.

B-size (9/16"-18) is the standard for most industrial equipment. A-size (3/8"-24) is typically found on very small, light-duty torches. If your fitting is roughly 9/16" wide, it is likely B-size.

Yes, provided the equipment uses B-size Right-Hand connections. Many inert gas hoses use the same 9/16"-18 RH thread pitch.

Use a proper open-ended wrench or an adjustable wrench. Avoid using pliers or pipe wrenches, as they can round off the hex edges and damage the brass.

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