With a quantity of two pieces, the Nut,u.,6mm is the most used part in the PILLION*PDBG/PBK* diagram.
A sample from the products for the Pillion*pdbg/pbk* include: Stay Kit, Pillion Seat Kit Alc, Nut,u.,6mm.
The most reasonably priced component used on the Cb1000r 2009 (9) Australia Pillion*pdbg/pbk* is the Nut,u.,6mm.