XCBPTLTA Tree Light Transition Adapter By Cast Lighting (Min Quantity 2)The Cast Lighting XCBPTLTA is a Socket Transition Adapter from Unthreaded Receptacle to NPT 1 2" Threaded Stud Description Thisa transition adapter is 1 2" MPT x 1 2" female socket, made of solid bronze with a thumb screw for socket lock down. a Use Example: To use the Heavy Mounting Stake (CHMS1CB), which is 1 2" FPT, with current CAST Lighting Path Lights, Stem Extensions (XCBPSTEMS), or Telescopic Extensions (CWTRS), use the XCBPTLTA adapter. a a