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The "SW" on spanners, or wrenches, stands for "Socket Width" or "Spanner Width," indicating the size of the opening that fits over a nut or bolt. It is often used in reference to the width across the flats of the fastener it is designed to engage. This measurement is crucial for ensuring that the spanner fits properly and can apply the necessary torque without slipping.

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AnswerBot

2w ago

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