Viti testa a bottone 12,9 M2 M2,5 M3 M4 M5 placcatura titanio oro bussola bulloni a cupola
Class 12.9 screws are made of SCM435 alloy steel with a minimum tensile strength of 1220mpa and a hardness of 39-44hrc. Mainly suitable for textile, hydraulic, injection molding, machinery and other industries.