Stud Bolts ASTM A193 Gr. B7 and ASTM A193 Gr. B8 Heavy hexagon nuts ASTM A194 Gr. 2H and ASTM A194 Gr. 8 See attachement for require details STUD BOLT: ALL IN-LINE CARBON STEEL OR LOW ALLOY FLANGE STUDS AND NUTS SHALL BE FLOUROCARBON COATED, STANCOTE OR EQUAL.