I agree with Gerry in London(just abit west of me).. my JD140 uses Grade 5
bolts for the shear pin( yes, I found out the hard way....ugh).
Number 2 is too soft and may just fold over causing all sorts of
grief..number 8 is way too hard and 'other' things will break before the
bolt does.

Jay in Ggreensville,Ont