... , washers and screws 1)Bolt sizes:M2-M22*Length 2)Nut sizes:M2-M22 3)Washersizes:M2-M22 4)Standard ... ScrewApplications: bicycle, golf and medical equipments,optical coating material.medicial,aviation, military,petrochmeical engineering,metallury,salt-marking, texitile etc.Chemical ... , Aeros pace or Military, Petroleum Car,, Motor vehicle manufacturing, Machine parts, High corrosive environment etc.