The 1658694-1 is a universal ejection style pin header with ACTION PIN contacts designed for ribbon cable interconnect applications. This 20-position connector features military and center polarized configuration with 0.100 inch [2.54 mm] centerline spacing and a tail length of 0.174 inch [4.42 mm]. The connector is equipped with gold flash over palladium-nickel plating on mating surfaces (minimum 0.000030 inch [0.00076 mm]) and tin plate on tails (minimum 0.000100 inch [0.00254 mm]) over nickel underplate. The product is RoHS compliant and designed for use in ribbon cable interconnect solutions requiring reliable, polarized connections. Common applications include data acquisition systems, instrumentation, and industrial control equipment where secure, keyed connections are essential.