CGA200-1 - Miller CGA 200 Acetylene Inlet Nut for MC Tanks

Precision Brass Inlet Nut for Acetylene MC Cylinders

The Miller CGA200-1 Inlet Nut is a critical component for welding professionals utilizing Acetylene MC (Motor Cycle style) tanks. Manufactured to strict Compressed Gas Association (CGA) standards, this fitting ensures a safe and reliable connection between the high-pressure cylinder valve and the gas regulator. In the domain of industrial gas apparatus, the integrity of every connection is paramount to safety and efficiency. This nut is precision-machined from high-quality brass, a material selected for its non-sparking properties and resistance to deformation under torque, which is essential for maintaining a leak-tight seal in combustible gas applications.

The CGA 200 standard is specifically designated for small acetylene cylinders, often referred to as "MC" tanks, which are commonly used in HVAC, plumbing, and light-duty fabrication for their portability. Unlike larger acetylene connections which typically feature left-hand threads to prevent cross-connection with oxygen lines, the CGA 200 connection utilizes a right-hand thread (.625-20 NGO). The Miller CGA200-1 is engineered to these exact specifications, ensuring seamless compatibility with standard MC cylinder valves and corresponding regulator nipples. Using the correct nut is vital; attempting to force mismatched fittings can damage threads, compromise the seal, and lead to hazardous gas leaks.

This replacement part is ideal for MRO (Maintenance, Repair, and Operations) applications where existing equipment may have worn, rounded, or damaged nuts. Over time, repeated tightening and loosening can degrade the hex faces or threads of brass fittings. Replacing compromised nuts with genuine Miller parts restores the integrity of the regulator assembly. The component is designed to work in conjunction with a matching inlet nipple (sold separately) to seat firmly against the cylinder valve outlet. Whether you are refurbishing older Smith Equipment regulators or maintaining a fleet of portable oxy-fuel kits, the CGA200-1 offers the fit and finish expected from Miller Electric.

Installation requires standard wrenches, and proper torque specifications should be followed to avoid over-tightening. As a genuine OEM part, it meets all regulatory requirements for gas service hardware. It is a simple yet indispensable item for any technician's spare parts inventory, ensuring that downtime is minimized when a connection issue arises in the field.