Manufacturer Part Number: 31-NU-50C|Nut Type|Heavy Hex Lock NutMaterial|Stainless SteelThread Size (Inch)|1/2-13Thread Size (mm)|Material Grade|18-8Height (Decimal Inch)|Height (mm)|Height (Inch)|45/64Width Across Flats (Decimal Inch)|0.8610 to 0.8790Width Across Flats (Inch)|7/8Width Across Flats (mm)|Locking Style|InsertFlange Diameter (Decimal Inch)|Thread Direction|Right HandThread Fit Class|Standards|Insert Material|NylonFastener Standard|UNCMilitary Specification|Does Not Meet Military SpecificationsWidth Across Points (Decimal Inch)|0.9690Width Across Points (mm)|System Of Measurement|InchFinish Coating|UncoatedAdditional Information|Product Service Code|UNSPSC Code|