4 mm

5 mm

6 mm

7 mm

knuckle joint

cotter joint

oldham coupling

universal joint

only to the pinion

only to the gear

to stronger of the pinion or gear

to weaker of the pinion or gear

threads for the nut at one end and head at the other end

head at one end and the other end fits into a tapped hole of one of the parts to be fastened

threads at both ends

pointed threads

equating tearing resistance of the plate to the shearing resistance of the rivets

equating tearing resistance of the plate to the crushing resistance of the rivets

equating shearing resistance to the crushing resistance of the rivets

none of the above