AL-CU|commonly marked on electrical connectors to indicate the device is suitable for use with conductors made with either metal. 
Break-away|the torque required to loosen a fastener
Connector|a device used to physically and electiraclly connect two or more conductors. 
Lug|a wiring terminal used on wire sizes No. 8 and larger. 
Nominal size|a means of expressing the size of a bolt or screw. It is the approximate diameter or a bolt or screw.
Run-down|The torque required to overcome the resistance of associated hardware such as locknuts and lock washers, when tightening a fastener. 
Activity|Seismic _________ is movement of the earth such as during an earthquake. 
Seismic restraint| Seismic _________ is a device or method used to prevent or restrict the movement of equipment during a seismic event. 
Seizure|Set or ___________ is when a fastener may lock up during the last stages of rotation in reaching a final torque.
Tensile|________ strength the maximum stress a material can endure before being pulled apart.
Termination|The connection of a wire to its destination 
Classes|Thread ___________ distinguished according to the amount of tolerance the threads provide between the bolt and nut, and are deisnged by a number and letter combination that indicates the degree or fit for a thread. 
Series|Thread ___________: the combinations of diameter and pitch in threads that are applied to specific thread diameters. 
Standards|Thread __________: an established set of __________ for machining threads.
Torque|applying a specfici amount of twisting force to a threaded fastener.
Vibration|___________ isolator is a device that prevents the transmission of vibrations from operating machinery to surrounding objects.