Abstract: The present invention provides an apparatus and kit for tensioning a stud in a bolted joint to a desired preload, the apparatus comprising a locking means adapted for engagement with the stud, a removable bridge member arranged to at least partially enclose the locking means and to receive the stud therethrough, a removable actuator operable to actuate the locking means through the bridge member and removable tensioning means configured to apply tension to a load bearing surface of the bridge member so as to transfer tension to the stud, such that the actuator is operable to lock the locking means when the desired preload in the stud is achieved. The invention has application in many industries, including hydropower, wind, gas and steam turbines, nuclear, metal manufacturing, mining, shipbuilding and oil & petrochemical.

Abstract: A fastening apparatus is adapted to be inserted and removed from one side of a work piece having an opposite side which is substantially inaccessible to a worker. A first, externally threaded member is threadingly engaged with a receiving structure, and a second member is inserted within corresponding seats or grooves for interlocking the two members. In the preferred embodiment diverting seats are provided for forming the second member into locking engagement between the receiving structure and the first member. In one embodiment, seat structures are provided for engaging frangible panels or the like for high temperature applications.