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Lock Nut as fitted to 500cc, 650cc & 750cc Triumph Twins & Triples. Rear Brake Drums to Hubs and Mudguards Stays to Mudguards. Also used as BSA A10 Conrod Nuts.
Thread: 5/16″ CEI
MADE IN ENGLAND
OEM: 37-1691, W1691, 67-1537, 68-0065
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