The Miller R3A Nut is a specialized replacement component designed for use with the renowned Smith Little Torch and Quickbraze systems. Manufactured by Miller Electric (under the Smith Equipment brand), this nut is essential for maintaining the safety and functionality of your precision oxy-fuel welding and brazing equipment. It is specifically engineered as a Left-Hand (LH) threaded nut, which is the industry standard for fuel gas connections, ensuring that fuel lines cannot be accidentally connected to oxygen regulators or fittings.
Constructed from high-quality brass, the R3A nut offers excellent resistance to corrosion and wear, typical of the demanding environments found in jewelry making, HVAC repair, and industrial fabrication. The nut is designed to secure the hose to the torch body or regulator adaptors, providing a compression seal that prevents gas leaks. Its precise machining ensures smooth threading and a secure fit, minimizing the risk of thread stripping or cross-threading during assembly.
This component is critical for users of the Little Torch who need to repair or replace damaged hose fittings. It is compatible with standard fuel gases used with these torches, including Acetylene, Propane, MAPP, and Hydrogen. The R3A nut is often used in conjunction with the corresponding hose ferrule (sold separately) to crimp or secure the hose end. Proper maintenance of these connections is vital for safe operation, as worn or damaged nuts can lead to hazardous gas leaks.
Installation is straightforward for qualified technicians. Ensure the hose end is properly prepared and that the correct ferrule is used if applicable. The left-hand thread tightens counter-clockwise, distinguished by the notched hex on most standard fittings (though visual confirmation of the thread direction is always recommended). Always leak-test connections after replacement using an approved leak detection solution.
| Additional Information |
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| Packaging Description:1 Per Ea |
| Item:Nut |
| Used On Which Gas:Acetylene, Methane/Hydrogen, Propane Vapour |
| Thread Direction:Left Hand (LH) |
| Material:Brass |
| Compatibility:Little Torch, Quickbraze |
| Connection Type:Hose Connection |
