These custom flange nuts were manufactured domestically using 17-4PH stainless steel material with 10-24 internal thread.  Overall height of the flange nut was .19" +/-.01" and the diameter of the flange was a critical dimension at .330" +.000/-.015".  The hex was set to .250" +.000/-.005" across the flats.  Our internal part number is NRNS-10-117-4 and typical lead time for full production is 6-8 weeks from order confirmation.