Pin Fit and Contact Material
The 5050871-6: This socket grips pins from 0.042" to 0.049" diameter — that's a 1.07mm to 1.24mm range, covering standard component leads and test pins in that band. The beryllium copper contact gives it spring memory: repeated pin insertions won't let the grip go slack, which matters when you're swapping modules or probing a board multiple times.
Temperature Range and Finish
Rated from -65°C to 126°C, so it lives comfortably in military avionics bays, industrial enclosures near hot machinery, or outdoor telecom cabinets that see winter cold.