Where can I e-buy the bolt connecting the two parts of the propeller shaft (labelled '1' on the illustration below)?
It is a UNF 3/8" x 1 1/4". The old bolt has Class 10.9 strength – equiv. to Grade 8. I suppose a replacement bolt should be of the same quality?
I got a new bolt from GWR Fasteners (e-Bay), but it's Grade 5 – equiv. to Class 8.8.