Manufacturing And Production Technology
Threading is an operation of

Producing a hole by removing metal along the circumference of a hollow cutting tool
Sizing and finishing a small diameter hole
Smoothing and squaring the surface around a hole
Cutting helical grooves on the external cylindrical surface

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Manufacturing And Production Technology
A fixture is defined as a device which

Holds and locates a workpiece and guides and controls one or more cutting tools
All of these
Holds and locates a workpiece during an inspection or for a manufacturing operation
Is used to check the accuracy of workpiece

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