Plastic nut that holds the cover/liner in rear trunk

[threpwood]

Bottom view of the nut.

[threpwood]

Thanks Mike,
2 of these- 999.049.020.40 plastic nut T5/30 x 5,1
6 of these- 999.049.024.40 plastic nut T5/40 x 8
Just wanted to confirm the correctness so I posted this message again for others to confirm. I already got it ordered, thanks!

[R60us]

I know this is dumb...But... I took them off and can not get them back on. I tried to twist, screw, push, and force but, they just do not seem to go back on?

Weird?

[threpwood]

It just snaps on top of the screw