12 Threads per Inch; 4-21/32" Outside Diameter; 0.698" Nominal Thickness; 3.527-12 Thread Size; 3.473" Thread Pitch Diameter Min; 3.48" Thread Pitch Diameter Max; W-18 Lockwasher Part Number; UNS Thread

18 Threads per Inch; 2-1/4" Outside Diameter; 1/2" Nominal Thickness; 1.563-18 Thread Size; 1.527" Thread Pitch Diameter Min; 1-17/32" Thread Pitch Diameter Max; UNS Thread

Tapered Roller Bearing Assembly; Standard Precision; Basic Number 39590; 2-5/8" Bore; 4-7/16" Outside Diameter; 2-3/8" Width; Double Row