Pin socket for 0.042" to 0.049" pins
The 5645979-1 is a Series 5 pin socket from TE Connectivity AMP Connectors, accepting pin diameters from 0.042" to 0.049" (1.07mm to 1.24mm).
Contact material and plating
Beryllium copper is the contact material — it holds spring force through repeated insertions better than phosphor bronze at elevated temperature.
