Knob screws are used mainly on glass parts of the canopy. This version has the M5 bolt which is 6mm long. There is an alternative version listed separately which has an M6 x 10mm long bolt inserted.
Aeroklas Spares At 4x4AT.com
Aeroklas replacement spare part black dome headed bolt for tailgate hinges and catches M6 x16
Isuzu D-Max 2012 Onwards Aeroklas Canopy Right Hand Pop Out Window Set