Slant 6 Exhaust Manifold Washers

These links don’t work. I don’t need studs to the head I have all new . I’m asking about the 3 bolts only that hold the two manifolds together . I bought a full kit. But it did not come with these three bolts
Hardware store. The one closest to the engine is supposed to be a stud, not a bolt. It's also one size larger than the two outboard bolts. The two outboard bolts are 5/16 and the stud is 3/8.