347995 - Push-Lock Hose Nipple, B-Size Water Connection, 3/8-Inch ID

Technical Overview of the ESAB Push-Lock Hose Nipple

The ESAB Push-Lock Hose Nipple (SKU: 347995) is a specialized pneumatic and hydraulic fitting designed specifically for the welding industry's water-cooling requirements. Engineered to facilitate secure fluid transfer in high-demand environments, this component connects 3/8-inch Inner Diameter (ID) hoses to standard B-Size water outlets or inlets. The nipple features a distinct push-lock (or push-on) barb profile. Unlike standard serrated barbs that require worm-gear or crimp clamps to maintain seal integrity, the push-lock design utilizes aggressively angled barbs that grip the inner liner of compatible push-lock hoses. As internal pressure increases, the hose tightens around the barbs, creating a self-sealing mechanism that is both reliable and streamlined.

Manufactured from high-grade brass, this fitting offers excellent machinability and superior resistance to corrosion—a critical factor when handling water or coolant mixtures that can degrade lesser materials over time. The brass construction also ensures that the seating surface remains smooth and undeformed, preventing leaks at the connection point with the regulator, water cooler, or torch interface. The "B-Size" designation refers to the Compressed Gas Association (CGA) standard typically used for welding fittings (5/8"-18 thread compatibility when paired with the appropriate nut), ensuring broad compatibility with North American welding equipment.

This component is essential for maintenance and repair operations (MRO) involving water-cooled TIG torches, MIG guns, and recirculating water coolers. By eliminating the need for external clamps, the assembly profile is kept compact, reducing snag points and potential sources of abrasion in dynamic welding environments. It is recommended for use with hoses specifically rated for push-lock fittings to ensure the maximum pressure rating and safety factor are maintained.