Abstract: An interface device for tensioning or relaxing a bolt in a nut-and-bolt assembly wherein the bolt extends in an axial direction. The interface device comprises a frame having a first end portion and a second end portion. The first end portion is provided with a rotatably-mounted nut ring for receiving and rotating a conventional nut on the bolt. The second end portion comprises a mechanical tensioner nut configured for reacting on the frame and for receiving a part of the bolt that extends beyond the conventional nut. The mechanical tensioner nut is configured for being driven by a low-pressure torque tension tool to tension or relax the bolt in operational use of the interface device. The device provides a very compact torqueing solution for use with low-pressure torqueing tools.

Abstract: The invention relates to a multi-bolt or nut torque wrench device (10, 10a, 10b) for installing or removing a plurality of threaded bolt or nut members (150). The device includes a reaction plate (20), a plurality of torque stations (30) mechanically coupled to the reaction plate (20) and configured for receiving one of the bolt or nut members (150) in operational use. In operational use, each torque station (30) applies reaction force directly and only to the reaction plate (20), and in that the reaction plate (20) and plurality of torque stations (30) are configured to be located substantially at an upper side of a respective flange (110) of a part to be coupled or decoupled from a part (100) in operational use, such that the torque wrench device (10, 10a, 10b) is configured for resting substantially on the plurality of threaded bolt or nut members (150) in operational use.