GU92602316 Super common axle nut as used on many models of the '70s, '80s and '90s. This nut has an across the flats measure for a 24mm wrench, the internal diameter measurse a little under 15mm, and it's got a 1.5mm thread pitch. This axle nut was used on lots of bikes including 850T3, T4, T5, Mille GT, V1000G5, V1000 I Convert, California II, 850 LeMans, LeMans II, LeMans III, LeMans 1000, CX100, 1000SP, SPII, SPIII, 1000S, Quota 1000, V35, V50, V65, V50 Monza, V50III, V65SP, V65C, V65 Lario, etc. Sometimes used front and rear, sometimes only on the rear, so check your measurements. This nut is also the securing nut for the dummy camshaft nut on Centauro, Daytona, and MGS01.