New Triumph & BSA TDC Timing Plug Screw. Screw is made in England to replace both Triumph and BSA part number 21-1872. Features a (13 TPI) right hand thread to fit the following models…. Triumph 650 & 750 twins from 1969-1982. Fits BSA A50 & A65 twins from 1969-1972. Screw also works as the sump screw on many Triumph T140 and TR7 models. Please refer to your parts catalog for proper fitment.

*****Always check your parts book to ensure the best fitment.*****

Made in England
O.E.M Part number is 21-1872