Mobylette AV7 Engine Crankcase Bolt Part Number 366 (7mm x 1 x 47mm)

Mobylette Engine Crankcase AV7 Bolt Part Number 366

Dimensions 7mm x 1 x 47mm

If you rethread it down then it could also be used to replace the 30mm long bolt.

Also look at 15148 which is a different size for the upper part.