A roll of stainless steel wire.
Assortment of cable ties, especially some larger 18 to 24 inch heavy duty.
Assortment of screws, nuts/bolts, washers. (smaller size, like what you'd find in an rv)
One's I carry are stainless steel.
Assortment of fuses (whatever is in your rig), and a few extra mini circuit breakers (my Lexi uses them). Also, some 10 foot lengths of 10,12 14, 16 guage electric wire.
Bottle of Weldwood Contact Cement.
An assortment of stright and angle push on (sharkbite) fittings and some lengths of pex for emergency plumbing repair.
Small camp saw and hatchet. Small breaker bar.
Some xtra everyday type stuff that always seems to go bad, the rubber hose end washers, some drawer latches, batteries, ect.
And, of course the usual tool kit, drill, air compressor, ect.