If you need to ream a hole to a tight tolerance in an unusual specification, the answer can be found at Magafor. Hassay Savage Magafor has a line of standard carbide reamers from .0078" in .0002" increments to .0236" and in .0004" increments up to .3760".

They stock over 1,000 specifications of standard reamers in Turners Falls, MA with additional stocking locations around the country. Next day delivery of one reamer. No specials, no minimums, no long lead-times.