I need to have custom jam nuts made as the mating parts have an extra fine J thd and these need to match and no common std parts of suitable quality exist. Need 50 each of these, .3125-32 UNJEF thd, .50 across flats, about .28 thick made of A286 STA. Program rules require parts list to call out stock size and supplier must work with that choice. What would be a preferred stock shape; plate, hex bar, round bar or other? Tolerances about same as typ aerospace std jam nuts.
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