Locknut; 12 Threads per Inch; 5.443" Outside Diameter; 0.76" Nominal Thickness; 4.122-12 Thread Size; 4.068" Thread Pitch Diameter Min; 4.076" Thread Pitch Diameter Max; W-21 Lockwasher Part Number; UNS Thread

12 Threads per Inch; 5-7/16" Outside Diameter; 0.76" Nominal Thickness; 4.122-12 Thread Size; 4.06" Thread Pitch Diameter Min; 4.068" Thread Pitch Diameter Max; TW-121 Lockwasher Part Number; NS Thread