40V77-50 - 50ft Inert Gas Hose Extension, 5/8-18 RH Fittings

Technical Overview of the 40V77-50 Inert Gas Hose

The 40V77-50 is a premium-grade inert gas hose designed to facilitate the transfer of shielding gases from regulators or flowmeters to welding power sources or wire feeders. With a substantial length of 50 feet, this hose assembly is engineered to solve logistical challenges in large fabrication environments where gas cylinders must be stationed at a distance from the welding arc. The hose is constructed from high-quality, durable vinyl materials that offer resistance to common workshop hazards, including abrasion, minor impacts, and kinking, ensuring a consistent flow rate essential for defect-free welds.

This assembly comes pre-fitted with standard 5/8"-18 Right-Hand (RH) Male connections on both ends. This connection standard, often referred to as the "B" size inert gas fitting (CGA 032 compatible outlet), ensures seamless integration with the vast majority of American standard welding regulators, flowmeters, and machine gas inlets. It is compatible with all standard inert shielding gases used in welding processes, including pure Argon, Helium, Carbon Dioxide (CO2), and Argon/CO2 mixtures.

In TIG (GTAW) and MIG (GMAW) applications, maintaining gas purity is critical. The 40V77-50 utilizes crimped ferrules to secure the fittings, providing a leak-tight seal that prevents atmospheric contamination and gas loss. This hose serves as an excellent replacement for damaged stock hoses or as an extension to expand the working envelope of your welding station. Whether used for stationary bench work requiring distant cylinder storage or mobile fabrication carts, this hose delivers reliability and performance.

Specifications and Compatibility

The hose features a standard internal diameter (typically 1/4 inch) optimized for shielding gas flow rates commonly used in manual and semi-automatic welding (10-50 CFH). It is rated for the low-pressure side of the gas delivery system (downstream from the regulator). Users should verify that their equipment utilizes standard 5/8"-18 RH female ports to ensure proper mating. This part number (40V77 style) is widely recognized in the industry as a standard gas hose configuration for TIG and MIG setups.