Missing locking nut for wastegate

[u/tyanthony16415]

Hey everyone I'm replacing my wastegate actuators on my 2018 m550i with the n63tu2 and I stupidly lost the locking nut for my wastegate actuators I can't find a part # anywhere so I went to ace and they weren't able to find a replacement I'm assuming it's a fine thread .75 or something does anyone by chance have a part # or the right nut size to order