61N39 - ESAB 61N39 Contact Tube 1/16 in (Pack of 5)

ESAB 61N39 Contact Tube Overview

The ESAB 61N39 Contact Tube is a critical consumable component designed for heavy-duty MIG (GMAW) and Flux-Cored (FCAW) welding applications. Engineered to precise tolerances, this contact tube is specifically sized to accommodate 1/16-inch (1.6 mm) welding wire, ensuring optimal electrical contact and smooth wire feeding. It is manufactured from high-grade copper alloy, which provides excellent thermal and electrical conductivity, essential for maintaining a stable welding arc and preventing overheating during prolonged welding sessions.

This specific contact tube is designed for compatibility with a range of classic and robust ESAB (formerly Linde/L-Tec) MIG guns, including the ST-12, ST-23, MT-200, and MT-400 series. These guns are often found in heavy fabrication environments where durability and reliability are paramount. The 61N39 tube features a threaded design that ensures a tight mechanical connection to the gas diffuser or gun head, minimizing electrical resistance and maximizing current transfer to the wire. Proper seating of the contact tube is vital for preventing micro-arcing inside the gun, which can damage the threads and reduce the lifespan of the torch head.

Supplied in a convenient pack of 5, these contact tubes allow for efficient inventory management and quick replacement on the shop floor. Regular inspection and replacement of contact tubes are recommended to maintain weld quality. As the bore of the tube wears into an oval shape ("keyholing"), the electrical contact point becomes inconsistent, leading to an unstable arc, increased spatter, and potential burn-back. The ESAB 61N39 is built to resist this wear, offering a longer service life compared to generic alternatives.

Whether used in structural steel fabrication, heavy equipment repair, or general industrial manufacturing, the ESAB 61N39 ensures that your welding equipment operates at peak performance. Its robust construction handles the heat and mechanical stress of feeding heavy-diameter wires, making it a staple consumable for welders relying on ESAB's proven torch technology.