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 ... of the quality control.6. Certificate:ISO9001-2008 ,And Provide dimensions report,chemical report and other testing report . Almost each year ...