These custom precision drilled hex nuts were manufactured domestically in the USA using DFARS compliant 303 stainless steel material with NADCAP certified passivation per AMS QQ-P-35. Internal 5-40 2B thread fit was incorporated and two corners drilled at a .026 +/- .005″ diameter. Outside dimensions are 7/32″ across the flats and .244″ across corners. Full paperwork was provided with the parts.