Maybe, but probably not. To check, the expansion nut for
7/8" steel bars is 5/8" at the widest point, the one for 1" steel
bars is 3/4". All Hollow-Tube fitments seem impossibly loose
before tightening. It is just an indirect result of our
efforts to make a solid metal-on-metal connection that still fits
as many bars as possible. The design of our hollow-tube fitments
depends on two points of contact: The expansion nut, which
must be tightened and deformed forcefully against the inside of the
bar, and the conical hilt of the nose, which is pulled against the
inside lip of the handlebar in the last moments of tightening. It
adds up to tightening it two times; once to deform the nut, then
loosen a turn and press the assembly into the bars and wiggle it to
make sure the hilt of the nose is seated, then tighten again.
At that point, there should be no play at all, in any direction,
and it should stay put till you loosen it.