ScootsUSA 175-24-8383 M6-1.00 x 40 Bolt M6x1.00 Bolt, 40mm Shaft Length used to mount the CVT Cover and Right Crankcase Cover in 150cc and 125cc GY6 4-stroke QMI152/157 QMJ152/157 engines and 150cc GY6B 4-stroke ZNEN engines. Also, used to mount the Right Crankcase Cover in VOG 260 BN169MM Engines commonly found in Linhai 250/260/300 Scooters and many other makes and models. May also be used in other applications. Thread Size: M6x1.00 Shaft Length: 40mm Thread Length: 23mm Overall Length: 46mm