K1 Spare parts for hot end

Hi, I´ve just changed the hot end from my K1 MAX and even being an original spare part, I was no able to use the new bolts that came along.
Can anyone tell me the bolt specs used on those hot ends?

Best regards

It depends if your nozzle is the all-in-one (unicorn)

m2×22 Or m2×10

Non-unicorn will be the longer M2
Unicorn as in the photo I shared will be the shorter M2