1/4 inch Mono plug, Nickel,plated.. .. .... late 50's - 60-70's style.. Have the plastic cap or a metal cap for the plug if needed?  The black F cap is 5.50. the  Metal caps are 7.95 ea.  and were pressed on, we have the press to do that ,but the wires need to be soldered on first or you can try to crimp it yourself?   The labor for crimping  the metal cap on with the press is 8.00 ..The 1/4 plug was used on cloth and plastic covered speaker wire harness, piggyback head to cabinet cords.