1-87175-0 is a 4-position AMPMODU Mod IV receptacle housing assembly designed for single-row, end-stackable interconnection applications. The housing features a 0.100 x 0.100 inch (2.54 x 2.54 mm) centerline spacing with 0.300 x 0.300 inch (7.62 x 7.62 mm) overall dimensions (dimension A x B), and a low-profile outrigger design with 0.200 inch (5.08 mm) tine spacing. The housing is constructed from glass-filled thermoplastic material rated 94V-0, with contact plating options including duplex gold and matte tin finishes on nickel underplate. The assembly supports dual-entry configuration and is end-stackable for modular connector applications. This housing is commonly used in wire-to-board interconnection systems where compact, reliable, and stackable connector solutions are required for electronic equipment and instrumentation.