Genuine screws are only threaded for a short distance on the end, long length of the screw body is not threaded.
18/39 = approx . metric pitch of 2mm, too coarse.
A picture would be quick to tell.
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03man(Don Voigt); Luger student and collector.
Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie
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