a-s / NYC 6254 is the part number. Having a hard time finding this pin.
Paul from SWISCO responded:
June 5, 2018
Greetings. This sash pin was made by Allen Stevens from NYC. Unfortunately, they went out of business and no one picked up the mold for this pivot bar. Take a look at our 17-056, 26-355 or 26-361 pivots as possible replacements. Good luck!