The 1-2040586-1 is a sequential long tab contact designed for use within TE Connectivity's D-4000 series connector system. As a 'long tab' contact, it is designed for sequential mating, ensuring the ground connection is established before power contacts engage. It is supplied as a loose piece for manual termination and accommodates a wire size range of 20 to 18 AWG with an insulation outer diameter of 1.8 to 2.7 mm. This contact is part of a high-current system featuring a robust 4-point contact design for high reliability. Its primary application is in industrial equipment requiring safe and reliable power connections where first-mate, last-break functionality is a critical safety feature.