NUT,LONG NUT,HARDWARE NUTS 1.ISO,ANSI,JIS,DIN,BS& non- ... .Grade:4.8 ,6.8,8.8,9.8... NUT,LONG NUT,HARDWARE NUTS AND BOLTS . A good non-standard fastenerS ... will actually do strength what you want,testing we can pass.4.Quality equipments and QA staffs random check or total ...