Manufacturer Part Number: 440003|Nut Type|Hex Lock NutMaterial|SteelThread Size (Inch)|1/4-20Thread Size (mm)|Material Grade|2Height (Decimal Inch)|Height (mm)|Height (Inch)|19/64Width Across Flats (Decimal Inch)|0.4390Width Across Flats (Inch)|Width Across Flats (mm)|Locking Style|Expanding Flex TopFlange Diameter (Decimal Inch)|0.4300Thread Direction|Right HandThread Fit Class|2BStandards|MIL-S-7742Insert Material|Fastener Standard|MIL-S-7742Military Specification|Meets Military SpecificationsWidth Across Points (Decimal Inch)|0.4910Width Across Points (mm)|System Of Measurement|InchFinish Coating|CadmiumAdditional Information|Product Service Code|UNSPSC Code|