Machine parts made of ceramics used in the field of mechanical engineering, namely, welding pins and welding sleeves used for resistance welding to locate metal parts, for electrical insulation to avoid sticking of sputtering and stud welding, positioning and locating pins for centering two metal parts to assemble these parts, [ nozzles used for air texturing, interlacing, tangling and spin finish migration in the area of filaments of chemical fibres, broaches, mold inserts, ] stamping dies, [ clinch dies, ] punching dies, punching sleeves [, mandrel for drawing pipes, mandrel expander for pipes, thread carriers, thread guides and carrier tubes for threads used to remodel and reshape metal, and blades for cutting machines ]