A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

Embodiments are directed to first and second structural members that are threadingly-engaged with each other. The first and second structural members are dissimilar strength materials. Each structural member configured with a plurality of threads for the threading engagement. The thread thickness of each thread in the plurality of threads for the first structural member is not equal to the thread thickness of each thread in the plurality of threads for the second structural member.

Embodiments are directed to first and second structural members that are threadingly-engaged with each other. The first and second structural members are dissimilar strength materials. Each structural member configured with a plurality of threads for the threading engagement. The thread thickness of each thread in the plurality of threads for the first structural member is not equal to the thread thickness of each thread in the plurality of threads for the second structural member.

A tensioning apparatus is adapted to simultaneously tension a number of jackbolts of a multi jackbolt tensioner. The tensioning apparatus may be made compact by overlapping gear disks of the spindle gears and further act as a torque multiplier between the other gears of the tensioning apparatus. The tensioning apparatus can be part of a combination with a power transfer assembly.

A tensioning apparatus is adapted to simultaneously tension a number of jackbolts of a multi jackbolt tensioner. The tensioning apparatus may be made compact by overlapping gear disks of the spindle gears and further act as a torque multiplier between the other gears of the tensioning apparatus. The tensioning apparatus can be part of a combination with a power transfer assembly.

Provided in this disclosure is a self-tightening nut and bolt system. The nut and bolt system can be configured to provide a consistent level of tightness and torque to reliably attach two mechanical components together. The nut comes with a microcontroller, and a motorized thread, where the microcontroller controls the tightness of the nut. The microcontroller allows the nut's tightness to be monitored, and controlled over time. This prevents the nut from becoming loose, and allows certain levels of tightness to be controlled over time.

Provided in this disclosure is a self-tightening nut and bolt system. The nut and bolt system can be configured to provide a consistent level of tightness and torque to reliably attach two mechanical components together. The nut comes with a microcontroller, and a motorized thread, where the microcontroller controls the tightness of the nut. The microcontroller allows the nut's tightness to be monitored, and controlled over time. This prevents the nut from becoming loose, and allows certain levels of tightness to be controlled over time.

A thermally stabilized fastener system and method is disclosed. The disclosed system/method integrates a fastener (FAS) incorporating a faster retention head (FRH), fastener retention body (FRB), and fastener retention tip (FRT) to couple a mechanical member stack (MMS) in a thermally stabilized fashion using a fastener retention receiver (FRR). The MMS includes a temperature compensating member (TCM), a first retention member (FRM), and an optional second retention member (SRM). The TCM is constructed using a tailored thermal expansion coefficient (TTC) that permits the TCM to compensate for the thermal expansion characteristics of the FAS, FRM, and SRM such that the force applied by the FRH and FRR portions of the FAS to the MMS is tailored to a specific temperature force profile (TFP) over changes in MMS/FAS temperature. The TCM may be selected with a TTC to achieve a uniform TFP over changes in MMS/FAS temperature.

A thermally stabilized fastener system and method is disclosed. The disclosed system/method integrates a fastener (FAS) incorporating a faster retention head (FRH), fastener retention body (FRB), and fastener retention tip (FRT) to couple a mechanical member stack (MMS) in a thermally stabilized fashion using a fastener retention receiver (FRR). The MMS includes a temperature compensating member (TCM), a first retention member (FRM), and an optional second retention member (SRM). The TCM is constructed using a tailored thermal expansion coefficient (TTC) that permits the TCM to compensate for the thermal expansion characteristics of the FAS, FRM, and SRM such that the force applied by the FRH and FRR portions of the FAS to the MMS is tailored to a specific temperature force profile (TFP) over changes in MMS/FAS temperature. The TCM may be selected with a TTC to achieve a uniform TFP over changes in MMS/FAS temperature.

A thermally stabilized fastener system and method is disclosed. The disclosed system/method integrates a fastener (FAS) incorporating a faster retention head (FRH), fastener retention body (FRB), and fastener retention tip (FRT) to couple a mechanical member stack (MMS) in a thermally stabilized fashion using a fastener retention receiver (FRR). The MMS includes a temperature compensating member (TCM), a first retention member (FRM), and an optional second retention member (SRM). The TCM is constructed using a tailored thermal expansion coefficient (TTC) that permits the TCM to compensate for the thermal expansion characteristics of the FAS, FRM, and SRM such that the force applied by the FRH and FRR portions of the FAS to the MMS is tailored to a specific temperature force profile (TFP) over changes in MMS/FAS temperature. The TCM may be selected with a TTC to achieve a uniform TFP over changes in MMS/FAS temperature.