1.250 in. Lg, 0.750 in. Dia, one 0.875 in. Deep hole on first end, countersunk 45 deg, internally threaded 3/8-24 nf-2b 0.250 in. Deep, 0.332 in. Diameter 0.625 in. Deep from depth of thread, two no. 6 /0.138 in./-32 thd by 0.250 in. Deep holes on second end, spaced 0.438 in. C to c