Stuart to go back to your original question. A plated bolt is slightly better than a black bolt. Yellow and silver plate is similar, depending on what they are. They may be zinc washed, or a better quality plate. It depends on the manufacturers process, how many microns of specified plate etc.
The more you use an anti seize, the more you or someone younger will respect/ appreciate you in the future. Some things need loctite. You can work out which ones.
I hope that is a better reply.
Rob, I think the Hotchkiss was originally built with American standard fasteners. This was probably aborted by french mechanics who may have been more familiar with metric bolts, later in the service life of those jeeps.
The French built Jeeps Dodges GMCs and who knows what else. A lot to change. (they did the French V8 blocks, All imperial except the exhaust studs?)
British Ford Cortinas and Escorts were built with a British designed motor (imperial) and a German designed gearbox (metric). Consequently the fasteners at the bell housing were metric or imperial depending on which way the bolt faced. Those cars were built at a time of transition, and for example the MkI Escorts were basically assembled with imperial fasteners, while the MkII Escorts were metric. I'm sure you have examples of the same thing in that era when Canada changed.
Now we deal with the differences in metric, between Japan, Europe, and the Australasian std, and I am forever putting my wipers on when I want to turn a corner
