Wish you luck. 4-36 threads are an obsolete size and you won't find them in the big box stores. Look for a hardware store that's been at the same spot for sixty or more years.
You'll have to scour the web to find sources. But they're are there. Unfortunately I lost my listings when the computer crashed last year.
RonM
Originally Posted by RonH:
Thank You Chuck for the quick reply.
This forum is great! What a wealth of information.
I will check a the local hardware stores in my area, and if I do not find the item will look online.