52MM lug bolts are needed for the 7MM spacers. You should have 45MM bolts on the stock wheels.
This Automotion site may help you:
http://www.************************************************************/productpage.aspx?pid=102089&name=H%26R+Trak%2b%c2%ae+Wheel+Spacers
Your current bolts may go into the hub, but are not the correct length for adequate strength.
And, as others have said, the round washer/flange needs to be removed
and reinstalled on the new bolts (just hit it hard with a hammer and open
end wrench to get it off)
Take care