https://www.valvegasketboltnuts.com/full-thread-stud-bolt-asme-sa193-b7-3-1-2-inch-750-mm-8un.html
Full Thread Stud Bolt, ASME SA193 B7, 3-1/2 Inch, 750 mm, 8UN | Topper
Full Thread Stud Bolt, Standard ASME, Material SA193 B7, Size 3-1/2 Inch, Length 750 mm, Surface Finished Black