641963-1 is a Universal MATE-N-LOK pin header designed for wire-to-board interconnect applications. This 2-circuit vertical pin header features a standard polarized tail configuration with pre-tin plating and meets UL94V-2 flammability rating. The header has a standard tail length of 4.45 mm (0.175 in) and a dimension A of 13.97 mm (0.550 in). It is designed to mate with Universal MATE-N-LOK plug housings using socket contacts, providing reliable power and signal connections in various electronic assemblies.