1 Answers
Option 3 : Spanner
Spanner:
- A spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts or keep them from turning.
- The most common shapes are called open-ended spanners and ring spanners.
- spanner tool is usually operated by hand, for tightening bolts and nuts. A spanner consists of a stout lever with a notch at one or both ends for gripping the bolt or nut in such a way that it can be twisted by a pull on the spanner at right angles to the axes of the lever and the bolt or nut.
Open-end Spanner:
A one-piece Spanner with a U-shaped opening that grips two opposite faces of the bolt or nut. This Spanner is often double-ended, with a different-sized opening at each end. The ends are generally oriented at an angle of around 15 degrees to the longitudinal axis of the handle.
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Ring Spanner: A one-piece Spanner with an enclosed opening that grips the faces of the bolt or nut. The recess is generally a six-point or twelve-point opening for use with nuts or bolt heads with a hexagonal shape. The twelve-point fits onto the fastening at twice as many angles, an advantage where swing is limited.
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