This and a number of other related fuel tank fitting bits and pieces are better being renewed, especially if you have purchased, or are about to purchase a new fuel tank. Even if you have had your old tank refurbished you will have spent a great deal of money if it has been done to a professional standard. New anti-vibe mounts and fasteners will help the tank remain in good shape when refitted over the long term.
Other fittings you may wish to consider regarding your fuel tank:
New fittings will simplify the remounting of the fuel tank and help ensure the unit remains in good undamaged condition. Add as many items to the same shopping cart as you wish and still only pay the same fixed price shipping cost.