Thanks for the pictures!
Do you recall what grade bolt you had as a shear pin? People on here and also the dealer have told me that Grade V bolts are the correct ones to use. BUT: If you were using a Grade V bolt and it twisted the shaft before shearing the pin, maybe Grade V is too strong for use (at least in some fifth wheels).
I'm thinking that maybe a Grade 2 might work better?
Seems to me it goes like this:
Grade 2 proof at 55,000 PSI
Grade V proof at 85,000 PSI
Grade 8 proof at 120,000 PSI
Maybe a softer bolt for shear pins might be cheaper in the long run?
Methinks changing a 20 cent bolt now is a lot cheaper than rebuilding a 80 dollar gear set when it breaks. ????