The most reasonably priced component used on the Xvs1100 1999 5el1 Spain 295el-352s1 Exhaust is the Washer, Plate(3aj).
The Exhaust is made up of components including this Muffler Assy 1 which is the most expensive.
On this parts fiche the Nut, Selflocking (4l0) is the most specified component.