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

Packaging: pack of 1
$48.17/EA $37.74/pack of 1 only $37.74/EASave 22%

Usually ships within 3-5 business days

OVERVIEW

Keep Your Oxy-Fuel Setup Leak-Free

There is nothing more frustrating than a hissing hose connection right when you are about to start a cut. The Western Enterprises C-66 Oxygen Nut is the industry-standard replacement part you need to fix those leaks or build new hose extensions. If you have ever stripped a nut on your regulator or crushed one by stepping on it, you know exactly why having a few of these in your toolbox is a lifesaver. This is the classic "B-Size" nut found on almost every standard oxygen torch and regulator in the trade.

Safety is the number one priority when dealing with pure oxygen. That is why this nut features Right-Hand threads—so you can never accidentally screw it onto an acetylene or propane line. The smooth brass construction threads on easily and seats firmly against the nipple, giving you a tight seal that holds up to the pressures of your cylinder. Because it is made of solid brass, it won't spark if you drop it or bang your wrench against it, keeping your hot work zone safer.

Whether you are repairing a cut hose in the field using a crimper or just replacing an old, rounded-off nut on your torch handle, the C-66 is the part that fits. It works perfectly with 1/4" and 3/16" hose nipples. Don't rely on tape or sketchy repairs for your gas lines; swap out damaged fittings with fresh brass and get back to burning metal with confidence.

Common Uses

  • Replacing stripped nuts on oxygen regulators.
  • Repairing cut or damaged oxygen hoses.
  • Building custom length hose assemblies.
  • Connecting torches to hose reels or manifolds.
Additional Information
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)
Compatible Nipple:C-67, C-69
Pressure Rating:200 PSIG
Packaging Description:pack of 1

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.