There are no service Packs for v8.6
The latest build is 3878 here
http://seer.support.veritas.com/docs/241035.htm
If you go to the software downloads page http://support.veritas.com/menu_ddProduct_BEWNT_view_DOWNLOAD.htm
and filter for Patch and 8.6 you can see all the HotFixes provided by Veritas.