I got the thumbscrews at either Ace or Truevalue (don't recall). They are better at having those types of things. I just walked in with the bracket and tried them until I found the right size. It literally takes me 30 seconds or less to remove/install my plate.
335is Coupe Space Gray, ZPP, 609, 2TC, 688, 494 and 6FL.
Matte Black M310 19's | Michelin PSS 235/35F, 265/30R | COBB AccessPORT | Eibach Pro Street S | Painted reflectors | Glossy Black Kidney Grilles
–Modding ain't easy