ACQ Rated Fastener NoCallout Size Grade 5Fastener Thread Type CoarseFQA Compliant Fastener YesMaterial SteelMetric Or SAE SAESAE or Metric 5/16-18 In.Alternate/OEM Part Number(s): 44250, 810141Hex Flange Nut-Grade 5 - 5/16-18 x 1/2 In.