Fastening Screw Muzzle Break SAKO TRG42 - 338 LM

[SAKOTRG42A1]

Good evening,

can someone help me and tell me what kind of fastening screw is needed for the original muzzle brake of the SAKO TRG-42?
I can't find any specs.

Thank you very much

 

[SAKOTRG42A1]

Solution: The screw is a M5x22... but the screw head must be manually revised to 7.9mm diameter...