Dorman/AutoGrade 675-003 Exhaust Manifold Stud and Nut Price For: Each Style: Unequal Double Threaded System of Measurement: Inch Thread Size: 3/8-24, 3/8-16 Overall Length (Inch): 2 Material: Steel Finish/Coating: Black Oxide Long Thread Length (Inch): 1 Short Thread Length (Inch): 5/8 Flat: No Flats Material Specification: Grade 8