If you talking about the screws in the base of the machine that lock onto the hinge pin, they’re probably 1/4-28, a common fine thread imperial. The pitch is 0.03571 inches, according to Machinery’s Handbook, which would be close to your 0.90 pitch in millimeters. Be careful, we also have a 1/4-20, which is more common, but a much coarser thread. If I get to the shop in the next day or so I’ll try to grab a thread gage and measure a screw on my Kenmore. Like Janey said, I think they’re pretty standard, at least in the American market.