Check nut

Also found in: Thesaurus, Encyclopedia.
Related to Check nut: castle nut, lock nut, Jam nut
(Mech.) a secondary nut, screwing down upon the primary nut to secure it.
a nut which is screwed up tightly against another nut on the same bolt or screw, in order to prevent accidental unscrewing of the first nut.

See also: Check, Nut

Mentioned in ?
References in periodicals archive ?
The Thumb Nut series of thumbscrews with internal female thread can be used as a stand-alone thumbscrew or in conjunction with the company's Instant Thumbscrew Knob to create a thumbscrew with a check nut, thereby facilitating locking down an adjustment.
Iii Items Consists Of 1 Silent Generator 4 Check Nut Locking Arrangement To Prevent 2 Centrifugal Clutch Governor Anti Clockwise Rotation.
Tenders are invited for S S Taper Pin Size 16 Mm Dia 82 Mm Length Taper From 19 Mm To 16 Mm Along With One Hexagonal Nut, One Check Nut , One Plain Washer And One Spring Washer As Per Drg.
8 Grade M 12 X 55 Mm Fully Threaded With 1 Two Flat Washers 2 One Spring Washer 3 One Full Nut 4 One Check Nut 5 One Split Pin Of Size 3 X 50 Mm Complete Set, A Hole Of Single 3.