Pin socket for component leads and test points
This TE Connectivity AMP Series 5 pin socket (5050871-5) is a closed-bottom receptacle designed to accept round pins from 0.042" to 0.049" diameter. The closed bottom prevents solder from wicking into the socket during wave or hand soldering, which keeps the contact beam clean and the pin insertion force consistent. With a socket depth of 0.275" and overall length of 0.288", the pin seats fully without bottoming out on the board surface.
Comparing gold vs tin finish options
Gold gives lower and more stable contact resistance over many cycles — important if the socket sees frequent pin insertions in a field-service or test application. Tin is cheaper but wears faster and can oxidize in high-humidity environments. For a one-time solder-in application, tin is adequate; for repeated mating, the gold version is the right call. The closed-bottom feature on 5050871-5 and 5050871-8 keeps solder out; the open-bottom siblings (5050871-1 and 5050871-6) allow flux residue or solder to enter the socket cavity, which can interfere with pin insertion in dense boards.