Last Updated
：2025/11/21
acorn nut
（ plural ）
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(engineering) A closed nut having a dome-like cap over the rear protruding part of the engaged screw or bolt.
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acorn nut
I tightened the acorn nut onto the bolt to protect the exposed threads and improve the assembly's appearance.
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I tightened the acorn nut onto the bolt to protect the exposed threads and improve the assembly's appearance.
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