Hello :
I am looking an source to buy jack new nuts and washers (not the complete jack) to restore some moogs of my collection ( also an arp 2600: here I will need the big and small ones)
It will be perfect to get the switchcraft original ones (if they sell them
looking for 150 for each size.
I will apreciate any help or contact
thank you
Mouser or any Switchcraft dealer sells them.
But be forewarned that Switchcraft’s quality can vary highly.
With one order, you might get shiny washers. On another, chalky looking or even rusted ones.
On the nuts too, you can get different thicknesses, flattened (unfinished) sides, etc.
Not very good especially for a company whose motto is “Consistently Excellent”
Here are some part numbers.
P10001 - Nuts
S10221 - Washer (standard quality or lack of 
S10451 - Washer (high quality)
This last 10451 style is kind of a special secret of theirs (and mine.)
These are usually thicker washers and have a great finish, but are more expensive and not always stocked.
But since these ones are usually truly consistently nice, they save time for me as I don’t have to individually inspect each washer I intend on using.
Switchcraft (and thus Mouser) also stock the smaller nuts and washers for the 2600s.
Download the Switchcraft PDF to be sure of the stock number as they carry two different styles of these parts and you want the smaller ones.
And fwiw, again the washers might suck in terms of finish.
However I’ve found that their 1/8" nuts are usually ok.
Good luck either way.
If you’d like a full kit of Minimoog washers, nuts and most screws, visit my store at http://www.minimoogs.com/store
If not shown as stocked, write the email address there and ask for them.
I will make up a set for you.
If you’re just in need of mass nuts and washers for various Moogs, it’s probably better to buy them from a big retailer as their prices will come down with higher quantity orders.