what bolt?
no bolt involved (at most in the locking collar if needed)
Again, there are several types of rims for that the one you likely end up using has a 1" keyed bore.
(there are also 1" bored hubs.. which a four(or what have you) bolt wheel would attach to.
Those require a locking collar on the axle side to prevent from sliding towards the center;
and a washer and a 3/4"
NUT on the outside to prevent it from falling off

the wheel/hub ONLY touches the 1" shaft, NOT the 3/4" step down portion of the axle.
Then there are split rims (there were step-down hubs... but no more IIRC)
split rims work only slightly different:
one half has a 1" bore to slide on the axle, the other half only has a 3/4" bore to rest against the step down shoulder.
Those do not require a locking collar, since they cannot move inwards, but since they still can fall off they too require a washer and a 3/4" nut.
the latter requires more than likely the longer step down to have enough room for the washer and nut to complete thread on.
And this option indeed sits in parts on the 3/4" step down portion of the axle;
the load is still mainly on the 1" shaft though.
no bolt, no drip nor drop involved...
And yes, you need either a live axle hub or bored and keyed rim for 1" axle
or a split rim 1" to 3/4" step down like I linked above [check the listings for live axle wheels there]
'sid