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14389 - Oxygen Regulator Adapter - B-Size Female to A-Size Male

Packaging: 1 per ea
$78.76/ea $51.76/1 per ea only $51.76/eaSave 34%

Usually ships within 3-5 business days

OVERVIEW

Connect Light-Duty Hoses to Standard Regulators with Miller 14389

Don't let mismatched threads stop your project in its tracks. The Miller 14389 Adaptor is the simple, reliable solution for welders who need to connect a light-duty "A" size oxygen hose to a standard "B" size regulator. If you have ever tried to hook up a small jewelry torch or a light-duty HVAC brazing torch to a full-size industrial oxygen tank, you know the frustration of realizing the hose nut is too small for the regulator outlet. This handy brass adapter solves that problem instantly, allowing you to adapt your gear without buying a completely new regulator.

Built by Miller Electric, a name synonymous with quality in the welding world, this adapter is machined from solid brass for long-lasting performance. It resists stripping and deformation, ensuring you get a tight seal every time you swap out your gear. The adapter features a Female "B" connection (9/16"-18) that screws onto your regulator, and steps it down to a Male "A" connection (3/8"-24) for your hose. It is designed strictly for Oxygen service, featuring the industry-standard Right-Hand threads to ensure safety and prevent accidental mixing with fuel gas lines.

Every welder's toolbox should have a set of adapters to handle unexpected equipment variations. Whether you are working in a shop, on a job site, or in a home garage, having the ability to adapt your gas flow from heavy-duty to light-duty equipment increases your versatility and efficiency. Stop searching for workarounds and use the correct fitting for the job. With the Miller 14389, you ensure a safe, professional connection that keeps your oxygen flowing smoothly so you can focus on laying the perfect bead or making the perfect cut.

Additional Information
Brand:Miller
Gas Type:Oxygen
Material:Brass
Packaging Description:1 per each
Connection Type:Adapter
Inlet Connection:B-Size (9/16"-18) Female
Outlet Connection:A-Size (3/8"-24) Male
Thread Direction:Right Hand (RH)
Application:Oxy-Fuel Welding & Cutting

INCLUDED

  • (1) Brass Oxygen Adapter Fitting (B-Size Regulator to A-Size Hose)

APPLICATIONS

  • Connecting light-duty 'A' size oxygen hoses to standard 'B' size regulators
  • HVAC/R brazing setups requiring smaller hoses
  • Jewelry repair and light fabrication oxy-fuel stations
  • Adapting equipment for specific torch handle requirements
  • General maintenance and repair operations (MRO)

FAQ

B-size fittings are the standard industrial size with 9/16"-18 threads, while A-size fittings are smaller, typically used for light-duty equipment, with 3/8"-24 threads.

No, this adapter has Right-Hand threads specifically for Oxygen. Acetylene and other fuel gases use Left-Hand threads (often marked with a notch) to prevent cross-connection.

This specific adapter (B Regulator to A Hose) is designed to screw onto the outlet of a regulator, converting it to accept a smaller hose.

The Miller 14389 is manufactured from solid brass, providing excellent durability and safety for oxygen service.

Yes, as long as the equipment uses standard CGA 'A' and 'B' size thread specifications, this adapter is compatible with most major brands of oxy-fuel equipment.

Generally, oxy-fuel fittings rely on metal-to-metal mechanical seals (often a ball-and-seat design). Teflon tape is usually not recommended for these specific hose/regulator connections as loose tape can create safety hazards in oxygen systems.
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