Triumph Pre-Unit Twins (Rigid) Gearbox Oil Filler Cap (1) - 57-0400 Switch so what did they use

so what did they use

Nut Threads Measures 1 1/16" with a 20 Thread Pitch

Renold is OEM (Made in England) while KCM (Japan) is our affordable option

-Triumph / BSA "closed circuit" in resting position

Triumph Pre-Unit Twins (Rigid) Gearbox Oil Filler Cap (1) - 57-0400 Switch so what did they useNew Triumph pre unit twins gearbox cover oil fill cap. This cap comes with a smooth "dome" top along with a polished alloy finish. Imported from England to replace Triumph part numbers 57 0400, 57 400, T0400 & T400 Fits most Triumph pre unit twins before 1951 with the proper gearbox as found on Triumph twins with rigid frames. Please check your parts book to ensure the best fitment. Please note that this cap is sold each as pictured **Features** Made