RE UCA question

I installed some fixed length UCAs I bought from a guy used. They're the same ones that come with the 4 1/2" kit. On the axle end, is there a different bolt and/or washers that go on there with the arm? I seem to have a slight gap between the inside edge of the arm and the outside of the bushing in the axle.
Also, after tightening there's only a few threads sticking out of the bolt, leading me to think that the kit may have included some longer bolts and other hardware. What about it...?
TIA!

I have the RE 4.5" kit with the fixed UCAs. Yes they do take a different bolt which is longer than stock. Its nothing special so you can pick one up at a local hardware store that would fit. Preferably a Grade 8 for safety.