A nut torqueing device (100) for a recessed nut is disclosed. The nut torqueing device includes a nut engaging assembly (102,104) to engage a nut in a recess. The nut engaging assembly includes: a nutengaging element (102,130) to engage the nut in the recess, at least one stackable riser element (132) to stackably connect to one of the nut engaging element and an adjacent stackable riser element(132,132C,132D,132F) therebelow, and a transmission engaging element (104,140) to stackably connect to an uppermost one of the at least one stackable riser element. A ratchet interface (104,106,130) within the nut engaging assembly allows rotation of the nut engaging element in only one direction, while other stackable elements rotationally interlock. A low profile transmission extends within a small space to transmit rotational power (108) to the nut engaging assembly. The nut torqueing device is applicable with a terminal nut of an electric generator.