Difference in Axle size

[RPS1392]

I know there is a difference in axle size between the N/A Z32's and the TT in respect to a 5 lug conversion, with the TT's being bigger, however, is the difference obvious during an install? My axles slide into these hubs (sold on ebay as N/A rear Z32 hubs) and allow enough torque to hold the wheels studs while tightening the axle nut, however when the clutch is engaged, they spin in the hubs. Is the difference that miniscule that it wouldnt show up until after the car is together?

[180fan]

if you're tying to use them on a 240sx, the z32 axles are too long.