19878 - A-Size Oxygen Hose Nipple for 1/4 Inch ID Hose

Technical Overview of the ESAB 19878 A-Size Oxygen Nipple

The ESAB 19878 is a specialized brass hose nipple designed for oxy-fuel gas distribution systems. Specifically engineered for Oxygen service, this component serves as the interface between the flexible welding hose and the threaded connection nut. It is manufactured to strict tolerances to ensure compatibility with standard A-Size oxygen fittings, which typically utilize a 3/8"-24 thread on the accompanying nut. The barb end is sized precisely for 1/4-inch Inner Diameter (ID) hoses, providing a tight friction fit that, when secured with a ferrule or hose clamp, withstands the pressures associated with oxy-fuel cutting and welding operations.

Constructed from high-grade brass, the 19878 nipple offers excellent resistance to corrosion and oxidation, a critical requirement for components used in oxygen-rich environments. The seating surface of the nipple is machined to mate perfectly with the internal seat of A-Size regulators, torch handles, or couplers, creating a metal-to-metal seal that prevents gas leakage. This component is essential for MRO (Maintenance, Repair, and Operations) professionals tasked with repairing damaged hoses or fabricating custom hose assemblies in industrial settings. It is a direct replacement part that meets or exceeds industry standards for gas welding equipment fittings.

Proper installation involves inserting the barbed end fully into the 1/4" ID oxygen hose and securing it with a crimp ferrule or appropriate hose clamp. The flanged end then sits inside the A-Size nut (sold separately), allowing the nut to rotate freely and thread onto the equipment while the nipple remains stationary, preventing hose twisting. This design ensures a durable and safe connection point for light-to-medium duty oxy-fuel applications where A-Size fittings are employed.