I carry a handful of JIS hardware, but also some that are mission critical. Spare front brake caliper bolts, in a pinch they can be harvested from other places, like the tow hooks. Driveshaft nuts/bolts, they are unique and differ front to rear, I carry 2 nut/bolt/washer combos for each. Knuckle/arm studs, carry 2 full setups, studs, nuts, washer and cone washer. Also a couple of IIRC, m12 x 1.50 bolts ~40mm long, this size does not exist on the rig, so cant steal them in the field. These can be threaded into the knuckle, as a last ditch, hail mary, hold the arm in place to get it off of the trail.
Most have been harvested from pick&pull, etc, but if you don't have that option... The driveshaft and knuckle stuff can be had from
Cruiser Outfitters local stealer, etc.