Early/earliest HP-41CV halfnut

[BillBee]

If its a stuck key I follow the method I learned from our other members.

DeOxit Red + 1 strand of stiff wire (from a wire brush). I put a drop over the corresponding pcb hole (there are little holes on the backside of the keys) insert wire strand and gently move around. Then exercise the key. Repeat as needed.

Hope that helps,
Bill