Board-to-Board Header, 48 Positions, 0.100" Pitch
It uses the standard 0.100" (2.54 mm) pitch on both rows and between rows, which matches the legacy 0.100" grid common on prototyping boards and through-hole backplanes. The header is loaded in all 48 positions with square gold-plated phosphor bronze pins — the contact finish is listed as Gold or Gold, GXT™ with a 30.0 µinch (0.76 µm) thickness on the mating surface, giving it good corrosion resistance for repeated mating cycles.
The 0.100" (2.54 mm) pitch and 0.100" row spacing place this header on a square grid. The 0.100" insulation height means the plastic body sits low to the board, leaving the long 0.820" mating pins exposed for stacking or direct receptacle insertion. The overall contact length of 1.040" (26.42 mm) includes a 0.120" solder post — enough for a standard 0.062" PCB with through-hole solder fillet. If you are replacing a 48-position unshrouded header on a legacy board, this part matches the footprint without layout changes.