Pin diameter acceptance and contact design
The 1-5645502-1: This PCB pin socket accepts pin diameters from 0.037" to 0.041" (0.94mm ~ 1.04mm) — the range that determines which mating pin or header it fits.
Board mounting and temperature envelope
Solder termination with no tail — the socket sits flush in a 0.069" (1.75mm) mounting hole and accepts board thickness from 0.031" to 0.125" (0.79mm ~ 3.18mm). The operating range of -65°C to 126°C covers most automotive, aerospace, and industrial cabinet environments without derating concerns at the extremes.