It uses a 0.100" (2.54mm) pitch on both rows and between rows, matching the standard 0.100" grid for straightforward PCB layout.
The 0.100" (2.54mm) pitch and 0.100" row spacing place this header on a standard grid — the board footprint is a 2 x 11 array of 0.040" plated through-holes on 0.100" centers. The 0.105" (2.67mm) solder post length suits typical 0.062" to 0.093" PCBs; if your board is thicker, verify the post protrusion for wave solder clearance.
