Working as a parts picker for Jim Carter back in the day, I took apart probably 100's of AD trucks and decided a long time ago that I am going with stainless steel hardware on my restorations. Pulling trucks apart without electricity means alot of bad words and wasted time spent with rusted nuts and bolts. So, there is a specialty place that sells only stainless..
Totally Stainless
and there is my favorite hardware outlet of all time because not only does it do stainless, but everything else and it keeps my information in their system so I can very quickly get anything I want in almost any quantity I want..
McMaster-Carr
Neither are the cheapest but between them they have almost every piece of hardware on the truck. No clutch heads, but button heads are very suitable substitutes.
They even have single drill bits in every size imaginable, and so much more. Check it out.
