They aren't really durability feats because he is immortal. Tsunade has better durability feats: She survived when Kabuto cut her respiratory muscles, she survived when Orochimaru stabbed her heart, and she survived when Madara bisected her.
A punch from Tsunade would destroy Hidan's body. Katsuyu's acid would melt Hidan's body. I don't know why can't you undertand this.
Tanking does not only mean surviving, tanking means being able to withstand attacks and still being able to fight, it doesnt matter if hes immortal, his durability feats still greatly surpass hers. And all the manga scan I have provided completely outclasses your so called durability feats Tsunade has.