K5105-28 - Lincoln Electric 1/4 Inch NPT Male Gas Quick Connect Fitting

Technical Overview of the Lincoln Electric K5105-28

The Lincoln Electric K5105-28 is a precision-engineered 1/4" NPT Male Quick Disconnect fitting designed for professional welding environments. Manufactured from high-quality solid brass, this component is engineered to withstand the rigors of industrial use while resisting corrosion and oxidation common in workshop settings. The fitting features a standard 1/4-inch National Pipe Taper (NPT) male thread, making it universally compatible with a wide range of welding regulators, flowmeters, and machine gas inlets that utilize NPT ports.

This specific unit functions as the male plug (nipple) portion of a quick-connect system. When paired with a compatible female coupler, it creates a secure, leak-proof seal essential for maintaining shielding gas integrity during MIG (GMAW) and TIG (GTAW) welding processes. The internal geometry is optimized to minimize flow restriction, ensuring that the shielding gas coverage remains consistent at the weld pool. Its robust hex-nut design allows for easy tightening with standard wrenches, ensuring a secure mechanical connection to hoses or equipment.

Reliability is paramount in gas delivery systems; leaks can lead to porosity in welds and wasted consumables. The K5105-28 is machined to tight tolerances to ensure positive engagement and disengagement. It is suitable for use with standard inert gases such as Argon, Helium, and Carbon Dioxide, as well as mixed shielding gases. This fitting is an essential component for MRO (Maintenance, Repair, and Operations) inventories, providing a standardized solution for gas line management.