The 0.100" (2.54 mm) pitch is the de facto industry standard for 0.025" square pin headers — your board footprint must match this centerline spacing exactly. 36 positions in a single row produce a long, narrow footprint roughly 3.6 inches long; the board edge or routing channel must accommodate that full length without interference. The 0.230" (5.84 mm) mating pin length gives enough reach to engage a standard receptacle housing; the 0.183" (4.65 mm) solder tail length suits typical 1.6 mm thick PCBs.
Mating and sourcing
For higher retention, consider a shrouded header or a latching receptacle.