Lock Nut Dimensional Standards MIL-S-7742 NASM25027 Finish Black Oxide Hex Height 15/32 in Hex Type Standard Heavy Hex Hex Width 1 1/2 in Lock Type Flexible Top Material Steel Material Grade/Class Grade 2 Maximum Temperature 1 200 Degrees F Minimum Temperature -70 Degrees F Pack Size Small Pack Removable Yes Resistance Properties Impact Resistant Shock and Vibration Resistant System of Measurement Inch Thread Direction Right Hand Thread Fit 2B Thread Size 1 In.-8