check nut

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Related to check nut: castle nut, lock nut, Jam nut


1. A nut which is designed so that it will not come loose, locking in place when tightened.
2. A supplementary nut, screwed down on another nut to prevent it from shaking loose.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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