90179-08040 mentioned above is a nut but not sure if it's the correct nut
for that location, look it up or ask your local Toyota dealer parts professional
when you order the studs.
90116-08147 is a stud bolt (stud)
Parts gurus chime in
^^^This ^^^, clean them up, replace when the new studs come in.
Took me 8 minutes to find the part number, get a cut and paste of the diagram, confirm the part online, then type it all up.
Not the parts expert but it might be 90116-08147
Try this dealer to confirm:
https://parts.olathetoyota.com/oem-parts/toyota-bolt-stud-9011608147
Look far lower right in the diagram, the parts next to the square gasket
might be what you're looking for. The upright stud is NLA, but the other...