stainless steel countersunk screws are also called stainless steel flat head screws. Although the name is different, the meaning is the same. If it is made of carbon steel, there will be 4.8, 8.8, 10.9, and 12.9. However, stainless steel is only 4.8. Some stainless steel countersunk screws require 201 grades, and some have 304 grades and 316 grades. Before producing stainless steel countersunk screws , it is necessary to see what production process is used for this screw. The production process mainly includes cold rolling and turning. The models used in cold heading are also different. If the stainless steel countersunk head screw is not so complicated, such as the ISO 2009 countersunk slotted machine screw, then it can be produced with a single-die machine. If there is a requirement for a slot, the slot is usually cut out. It’s not cold. In the case of GB 10-1976 countersunk horse-drawn carriage screws, such screws are generally produced in multiple stations. Of course,...