[James Tonthat]

I posted the McMaster number for a similar replacement part, it's 20mm long, and they're physically the same as the AM ones.

Edit: It is a lot easier to replace the bolt before it has sheared than after. After it shears, it usually breaks off leaving the threading in the dog gear. For replacing the bolt, you just need to rotate it so the bolt faces somewhere you can put an allen key in (down for us.) It is literally a 2 minute job to replace the bolts versus a 30 minute swap of dog gear if it does shear.