FULL THREADED BOLT & TWO HEXAGONAL HEAVY NUTS: Bolt : ASTM A193 GR. B16 Nut : ASTM A194 GR.4 FULL THREADED BOLT & TWO HEXAGONAL HEAVY NUTS: Bolt: ASTM A453 GR.660A Nut: ASTM A453 GR.660A Inquiry in the attachment