2b thread class right-hand 18 thread quantity per inch W0.125 in. dia. 8 holes equally spaced through wrenching flats, located 0.305 in. porm 0.010 from bearing surface; 1.875 in. dia 0.125 in. plus 0.020 in. w, circumferential groove located 0.305 in. porm 0.010 in. from bearing surface
1.380" hole diameter 1.930" outside diameter 0.060" material thickness 2 lugs 0.210 in. w by 0.186 to 0.190 in. high on flat unbroken side of washer, located opposite to each other recessed