1) Brake and Clutch pedal screws:
Length = 30mm
Diameter = 4mm (known as M4)
Thread Pitch = 0.7mm (really hard to measure this)
2) Accelerator pedal screws:
Length = 16.5mm (you can get away with using a 16mm)
Diameter = 4mm
Thread Pitch = 0.7mm
Best place to buy them In the UK:
https://www.accu.co.uk/
Make sure to select "metric socket countersunk screws" and then use their filter system to select the above measurements for the screws you need to replace :)