The 3433-6303 is a 50-way 2-row 0.100 x 0.100-inch straight four-wall Wire-to-board Header with gold-plated copper alloy contacts. This 3000 series connector comes with a glass filled polyester (PBT) insulator and long roll pin latch/ejectors. It has military (with 3M's 3518 polarizing key) with centerbump polarization.