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6979 - B-Size Acetylene Hose Coupler - Male to Male Brass Adapter

Packaging: pack of 1
$8.15/EA $4.92/pack of 1 only $4.92/EASave 40%

Usually ships within 3-5 business days

OVERVIEW

Precision Brass Coupling for Fuel Gas Systems

The ESB6979 B-Size Acetylene Male to Male Adapter is a critical component for industrial gas management, designed to facilitate the connection of two B-size female fittings. Manufactured from high-grade brass, this coupler ensures a leak-tight seal and superior durability in harsh welding environments. The fitting features standard 5/8"-18 UNF threads with a Left-Hand (LH) orientation, indicated by the notched nut, which is the industry standard safety feature to prevent cross-connection with oxygen lines.

This adapter is primarily used as a hose splicer or extender. By connecting two standard acetylene hoses (which typically terminate in female B-size nuts) to either side of this male-male coupler, operators can effectively double their reach without compromising flow characteristics or safety. The precision machining of the threads ensures smooth engagement and disengagement, reducing wear on hose nuts and preventing galling.

Suitable for use with Acetylene, Propane, MAPP, and other fuel gases utilizing B-size connections, this fitting is rated for the pressures typically encountered in oxy-fuel cutting and welding operations. It is an essential inventory item for maintenance departments, welding shops, and field service trucks where hose length flexibility is required.

Technical Specifications

  • Material: Solid Brass
  • Connection A: B-Size Male (5/8"-18 LH)
  • Connection B: B-Size Male (5/8"-18 LH)
  • Application: Coupling two female fuel gas connections
  • Safety Feature: Notched for Left-Hand identification
Additional Information
Packaging Description:1 Per Ea, pack of 1
Material:Brass
Connection Type:Coupler, Male x Male
Thread Size:5/8"-18 UNF
Thread Direction:Left Hand (LH)
Gas Service:Acetylene, Fuel Gas
Fitting Size:B-Size
----- new values below ----
Material:Brass
Connection Type:Male x Male, Coupler
Thread Size:5/8"-18 UNF
Thread Direction:Left Hand (LH)
Gas Service:Acetylene, Fuel Gas
Fitting Size:B-Size
Packaging Description:1 Per Ea

INCLUDED

  • 1 x Brass Adapter (B-Size Acetylene Male to B-Size Acetylene Male)

APPLICATIONS

  • Extending acetylene or fuel gas welding hoses
  • Connecting two female B-size fittings
  • Adapting manifold outlets
  • Field repair of gas distribution lines
  • Oxy-fuel cutting and welding setups

FAQ

This adapter features 5/8"-18 UNF threads, commonly known as "B-Size" in the welding industry.

No. This fitting has Left-Hand (LH) threads, indicated by the notch on the hex. Oxygen fittings use Right-Hand threads. You need a separate oxygen coupler (usually green) for oxygen lines.

It is machined from solid brass, which provides excellent durability and spark resistance.

If your hose has a standard "B" connection (the most common size for industrial oxy-fuel gear) and is for fuel gas (red hose), this will fit. The nut on your hose should spin counter-clockwise to tighten onto this fitting.

No, this is a solid one-piece adapter. The swivel action typically comes from the hose nuts connecting to it.

While the brass fitting itself can handle pressures over 200 PSI, Acetylene gas must never be used above 15 PSI for safety reasons. The fitting is fully rated for all standard fuel gas working pressures.

The notches on the hex indicate that the threads are Left-Handed. This is a universal safety standard for fuel gases to prevent mixing with oxygen equipment.

Yes, as long as your propane hose uses standard B-size fuel gas fittings (which most do), this adapter is compatible.