186W59 - CGA-320 Regulator Inlet Nut for CO2

Precision Brass Connection for Industrial CO2 Service

The ESAB C-59 Nut is a critical component for maintaining safe and efficient gas distribution systems. Designed specifically for the CGA-320 standard, this inlet nut is engineered to connect compressed gas regulators to Carbon Dioxide (CO2) cylinders. In the realm of industrial gas management, the integrity of every connection is paramount. This nut is manufactured from high-quality brass, a material chosen for its excellent machinability, durability, and resistance to deformation under torque. This ensures that the threads remain true even after repeated cycles of connecting and disconnecting, a common requirement in busy workshops and production facilities.

The CGA-320 connection is the industry standard for CO2 service in the United States and Canada. The C-59 nut features the specific .830"-14 NGO right-hand internal threads required to mate with CGA-320 cylinder valves. It is designed to slide over the appropriate regulator nipple (sold separately) and tighten down to compress the sealing washer against the valve face. Because CO2 cylinders typically use a flat-faced valve requiring a washer for a seal, the mechanical strength of the nut is vital to maintain adequate compression without stripping or cracking. This component is essential for anyone assembling custom manifolds, repairing damaged regulators, or configuring gas delivery systems for beverage, welding, or industrial applications.

Reliability is key when dealing with high-pressure cylinders. The ESAB C-59 Nut meets strict dimensional tolerances to ensure compatibility with all standard CGA-320 valves and nipples. Whether you are outfitting a large-scale fabrication shop or maintaining a fleet of portable welding rigs, using compliant and high-grade fittings like this one minimizes the risk of leaks and equipment failure. It is a fundamental spare part for MRO inventories, ensuring that downtime caused by a stripped or lost nut is kept to an absolute minimum.