Brake Disk Bolts ? America/speedmaster 2003

Quick check on Fowlers shows Part No T3050506-M8 x 37/40 for Carb and T3200601 foe EFI models Fronts both M8x40 HHF, for both Speedmaster and America although different part Nos.
Rears use M8x18 partno T2020608 with other nos for full sets.

Guessing they will fit both bikes have you thought of trying a set of Titanium bolts? Plenty around the internet

https://www.fowlersparts.co.uk/parts/9888/america-carb-models/front-brake-caliper-and-disc