206126-1 is a reverse numbering plug connector designed for AMP circular connectors in commercial signal and power applications. It features a 17-28 contact arrangement with Size 20 DF precision formed crimp contacts, accepting Size 20 DM or DF pin contacts. The connector is constructed from UL 94V-0 rated, heat-resistant thermoplastic material and operates reliably over a temperature range of -40°C to +105°C. Key dimensional specifications include a maximum overall length of 1.040 inches (26.42 mm), a mating face diameter of 1.435 inches (36.45 mm), and a 15/16-20 UNEF-2A thread size for secure panel mounting. This connector is ideal for applications requiring quick connect/disconnect capability with positive detent coupling and built-in contact protection, commonly used in commercial instrumentation, industrial equipment, and signal distribution systems.