MIL-S-19434B, MILITARY SPECIFICATION STEEL GEAR AND PINION FORGINGS, CARBON AND ALLOY, HEAT TREATED, NAVAL SHIPBOARD PROPULSION UNIT AND AUXILIARY TURBINE (31 DEC 1990)., This specification covers forging rims and blanks for gears and pinions to be used in gear assemblies for Naval shipboard propulsion units and auxiliary turbines.