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clamp screw

noun
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variants: or clamping screw

Definition of clamp screw

: a screw used to hold some part tightly in place by forcing it against an immovable part (as one used to secure a drill or other tool in a simple chuck) — compare setscrew

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“Clamp screw.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/clamp%20screw. Accessed 22 Jan. 2021.

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