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2. Torque wrench - Wikipedia

   en.wikipedia.org/wiki/Torque_wrench

   A click torque wrench. A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw.It is usually in the form of a socket wrench with an indicating scale, or an internal mechanism which will indicate (as by 'clicking', a specific movement of the tool handle in relation to the tool head) when a specified (adjustable) torque value has been reached ...

3. Hydraulic torque wrench - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_torque_wrench

   Four narrow-clearance hydraulic torque wrenches on a flange. A hydraulic torque wrench is a power tool designed to exert torque on a fastener to achieve proper tightening or loosening of a connection through the use of hydraulics. A torque wrench is applied to the nut either directly or in conjunction with an impact socket. Hydraulic torque ...

4. Bolted joint - Wikipedia

   en.wikipedia.org/wiki/Bolted_joint

   The applied torque causes the bolt to "climb" the thread causing a tensioning of the bolt and an equivalent compression in the components being fastened by the bolt. The preload developed in a bolt is due to the applied torque and is a function of the bolt diameter, the geometry of the threads, and the coefficients of friction that exist in the ...

5. SMA connector - Wikipedia

   en.wikipedia.org/wiki/SMA_connector

   SMA connectors are rated for up to 500 mating cycles, [8] but to achieve this it is necessary to properly torque the connector when making the connection. A 5 ⁄ 16 inch torque wrench is required for this, set to 3–5 in·lbf (0.3 to 0.6 N·m ) for brass, and 7–10 in·lbf (0.8 to 1.1 N·m) for stainless steel connectors.

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   The head is usually domed and is not designed to be driven. The end of the shank has a spline on it which is engaged by a special power wrench which prevents the bolt from turning while the nut is tightened. When the appropriate torque is reached the spline shears off. thread rolling screws: These have a lobed (usually triangular) cross-section.

7. Fastener - Wikipedia

   en.wikipedia.org/wiki/Fastener

   Flange head fasteners: Integrating a flange for a larger bearing surface, flange head fasteners distribute clamping force without damaging the material. Wing head fasteners: Featuring protruding "wings" for hand tightening, wing head fasteners are suitable for applications requiring frequent adjustments.