RA921 - Miller Smith RA921 12.5ft Grade R Oxy-Acetylene Hose (B-to-A Fittings)

Miller Smith RA921 Twin Welding Hose - Grade R

Equip your welding station with the Miller Smith RA921, a specialized Grade R twin hose designed for precision oxy-acetylene applications. This hose is critical for operators who utilize torch handles with "A" size inlet connections but rely on standard "B" size regulators on their gas supply. By integrating the conversion directly into the hose assembly, Miller Smith ensures a leak-free, secure connection without the added weight or potential leak points of external brass adapters.

The RA921 features a 3/16-inch internal diameter, which is the preferred size for light-duty welding and brazing. This smaller diameter results in a more flexible and lightweight hose compared to standard 1/4-inch lines, significantly reducing operator wrist fatigue during intricate tasks such as HVAC repair, jewelry making, or light metal fabrication. The hose is constructed from durable rubber compounds that resist kinking and abrasion, ensuring a long service life in typical shop environments.

Safety Warning: This is a Grade R hose. It is strictly for use with Acetylene fuel gas. It is not compatible with Propane, Natural Gas, or MAPP gas, as these fuels can deteriorate the lining of Grade R hoses, leading to leaks and safety hazards. Always verify your gas type before selecting a hose.

The 12.5-foot length is a strategic choice for bench-top applications, keeping your workspace organized and safe. The fittings are precision-crimped for maximum safety: the regulator end features standard 9/16"-18 (B-size) nuts, while the torch end features 3/8"-24 (A-size) nuts. This configuration is often hard to find but essential for specific Smith equipment and other light-duty torch brands.

Specifications

• Gas Compatibility: Oxygen and Acetylene Only.
• Hose Grade: R.
• Regulator Connection: "B" Size (9/16" - 18).
• Torch Connection: "A" Size (3/8" - 24).
• Dimensions: 12.5 ft Length x 3/16" ID.