87224-4 is a single-row vertical unshrouded header from the AMPMODU interconnection system, designed for reliable board-to-board connections. This 4-position header features a 0.100 inch (2.54 mm) centerline spacing with square posts measuring 0.025 inch (0.64 mm) and a post diameter of 0.035 ± 0.003 inch (0.89 ± 0.08 mm). The header has Plating B post finish and overall dimensions of 0.384 inch (9.75 mm) in length with a B dimension of 0.300 inch (7.62 mm). It is designed for use with PC boards having a minimum thickness of 0.055 inch (1.40 mm). This header is commonly used in electronic interconnection applications requiring compact, reliable signal connections.