Construction question

[shmokes]

For mobility reasons I need my cab to be disassebleable.  I'm thinking of countersinking carriage bolts through the side panels into an inner frame.  I will then laminate over the sides so the carriage bolts are not visible from the outside.  Is there a way that I can lock those carriage bolts in place (in addition to the square part of the bolt lodging itself into the hole) so they don't spin with the nut when I am tightening/loosening it?  See...once I laminate over the sides I will have no access to the top of the bolt (not that a carriage bolt head would give me anything to hold onto anyway).

I've attached a picture to better show my idea.

[HeadRusch]

In a word, no not really. Once the nut starts to tighten up on the bolt, and the little square nub underneath the top of the bolt starts to dig in, that ought to give you all the torque you need.
Tighten it up and you're done.

If you need to, buy bolts that are long enough for you to get a pair of vice-grips on the end of em, but you'll risk destroying your threads.

IMHO Dont sweat it, once the square-part bites into your hole (assujming you didn't drill too wide of a pilot hole) you'll be fine.

[OSCAR]

Instead of having the bolt heads under the laminate, why couldn't you countersink in T-nuts; you shouldn't need access to those after they are installed.  Then run the bolts in from the inside.  Just be really sure your bolts aren't too long and poke into the laminate.

[locash]

I would recommend using cross dowel connectors whenever making knock-down cabinets out of MDF.

http://www.leevalley.com/hardware/page.asp?page=44238&category=3,43715,45375&ccurrency=2&SID=