*Now In Stock!* New English Made Triumph 350 & 500 Unit Twins Gearbox Drive Sprocket Tab Lockwasher. We always recommend changing this Tab Washer when removing/installing your Drive Sprocket! Don’t re-use that “Buggerd” up Tab Washer again! Fits all Triumph 350 & 500 Unit Twins (Daytona, T100R, Tiger, T90, 3TA, 5TA, T100SS, Etc) from 1957-1974. Please refer to your parts catalog for proper fitment.*****Please note that this Tab Washer will only fir Triumph 350 & 500 Unit Twins!*****Made in EnglandO.E.M Part number is 57-2056 or T2056