I know it may be a little OT but I couldn't see a more relevant forum.

When machining parts for a production application that require fasteners like nuts, bolts, washers, etc, where do you guys buy such parts in production quantities?

I know about McMaster, but for some parts they can be expensive. I've found my local Ace hardware store is cheaper on most washers. I've cleaned out my HW store a bunch of times so I really would like an alternate source. I need to buy

Brass melt-in threaded inserts for plastic
1" #6 threaded studs
#6 1/2" and 1" fender washers
#6 nylon lock nuts

Preferably a place with online ordering so I dont need to waste a lot of phone time getting quotes.

I know about smallparts.com and McMaster.com, but is there anywhere else???

Thanks!

P.S. looking for these parts in quantities of maybe 1000-3000/ea part.