If there is contact, dealing with the manufacturer of Bolt, Nut, and Other Material. must request a certificate about the properties of Bolt, Nut, Material from the manufacturer.
If you are dealing with the manufacturer of Bolt, Nut, Material Other. need for certificates on properties of Bolt, Nut, Material from the manufacturer that come with it.
If dealing with the manufacturers, Material Nut Bolt, Other. to certification on the properties of the Bolt Nut,,, Material from manufacturers that come.