Brand new 2.5" WING NUT HINGED CHROME PLATED FUEL TANK CAP.This wing nut fuel tank cap is a exact replica of the orignal one and is made to highest specifications with great chrome quality. We recommend this for BSA, NORTON, TRIUMPH, ARIEL & AJS bikes with 2.5" petrol tank neck. This will replace PART NUMBER :- 66-8351 Please do get instore for more BSA happenings in our store Best for restorations and modifications