Used on b1-b acft. power drive unit p/n 2022124-3-1; mfg 70210, nsn 1650-01-168-2338; 2.761 in. o/a lg; cap end 0.719 in. dia; ctr section 0.950 in. dia hex end 1.000 in. dia w/lockwire holes; thded end 0.750 in. dia w/16 unf-3a thd; connecting chain 3.000 in. lg