102153-4 is a 20-position AMP-LATCH universal ejection style pin header designed for ribbon cable connector applications. It features a 2.54 x 2.54 mm [.100 x .100 inch] center spacing with a post length of 2.79 mm [.110 inch] and Duplex contact plating. The contact plating consists of 0.00058 mm gold on the mating end and 0.00254-0.00508 mm bright tin-lead on the termination end, with the entire contact underplated with 0.00127 mm nickel. This pin header is designed for military-grade applications with center and dual polarization options. It is compatible with AMP-LATCH receptacles and can be mounted using 4-24 self-tapping screws or 2-56 bolts and nuts on PC boards with 1.57 mm thickness.