At the Podolsk sewing machine, the base fastener flies out.

 n
At the Podolsk sewing machine, the base fastener flies out.
At the Podolsk sewing machine, the base fastener flies out. How to repair? This fastener is marked in the photo. Phyto from the Internet.

Answers:

†Padre Caudla mustachioed†
Underneath and put on the nut. Or replace the bolt with a larger one

mechanic Lelik
invite a locksmith, but you won’t say so

Irina Baron
I myself put a plus sign to Podolsky, manual typewriters. I advise, even children, to start with them. From the age of 12 to this. And great-grandfather Kauser. Turn the old one out and into the construction market. You will find a new one. Good luck.

Victoria
I used to use this one. I don’t remember that this mount flew out, or that its absence interfered with sewing. Perhaps pieces flew out in a wooden base, a heavy machine sags, and then the mount slips.

Alexey Kuznetsov
this is a hidden loop - take it out and take a picture - but most likely it is with teeth and just clogs - then it’s epoxy

P-18
This mount is simply inserted into the hole. And it should not be screwed with anything, unless the wooden base is a late forgery of the original case. The machine was universal. Under it, stationary tables were made, with exactly the same mount. In places where seamstresses needed to work. When moving, tables weighing more than a hundred kg remained, the cars were packed in their cases / boxes, and drove on.

Irina Polyakova
I also have a Singer from my great-grandmother. 1900. I don't sew. Not interesting at all