Manufacturer Part Number: HFNI20317-050B|Nut Type|Serrated FlangeMaterial|SteelThread Size|5/16-18Flange Diameter (Inch)|Flange Diameter (Decimal Inch)|0.6800Flange Diameter (mm)|Flange Height (Decimal Inch)|0.2830Flange Height|Flange Height|0.2830inFlange Height (mm)|Nut Height (mm)|Nut Height (Decimal Inch)|Material Grade|2Thread Direction|Width Across Flats (Inch)|Width Across Flats (mm)|Width Across Flats (Decimal Inch)|Thread Standard|Thread Fit Class|Standards|Minimum Width Across Flats (Decimal Inch)|0.4890Maximum Width Across Flats (Decimal Inch)|0.5000Minimum Height (Decimal Inch)|0.2680Minimum Flange Diameter (Decimal Inch)|0.6600Maximum Flange Diameter (Decimal Inch)|0.6800Hardness|Fastener Standard|Width Across Points (mm)|System Of Measurement|InchHeight (mm)|Finish Coating|ZincMaximum Height (Inch)|0.2830Height (Inch)|Type|Serrated Flange NutAdditional Information|Product Service Code|UNSPSC Code|