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Old 17th March 2021, 09:58 PM   #12
Fernando K
Join Date: Apr 2010
Posts: 621


I do not know if I will give myself to understand, because English is not my language

I think the first thing you should do is know how big the missing screw is. I mean that you must find out the diameter and pitch of the screw, checking the threaded part of the holes in the lock Example [: 5 mm metric screw. by a step of 0.8mm.)

As at that time the diameters and steps were not standardized, it is a bit difficult to get a copy, but it would be necessary to try with numerous screws (metric or Withwort) until obtaining one that threads. Knowing this, it is easy for a turner to modify an existing screw, or to manufacture one from scratch, modifying the hexagonal head to round, according to the surviving example.

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