A castle nut functions as a locking mechanism featuring__________________?
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Answer: D. through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
Explanation
A castle nut features slotted cutouts on top that resemble medieval castle battlements. A cotter pin passes through these slots and a drilled hole in the bolt shaft. Splitting and bending the cotter pin ends in reverse direction prevents the nut from backing off. Vibration in mechanical assemblies can cause standard nuts to loosen and fall off over time. Cotter pins are soft metal pins inserted through fasteners as a positive locking retainer. Castle nuts provide a reliable mechanical lock that withstands severe vibrational environments.
Automotive suspension and steering linkages frequently use castle nuts for critical safety joints. Aircraft maintenance protocols require positive locking devices like cotter pins on control surfaces. Technicians must always install a new cotter pin whenever a castle nut is removed and retightened. Option A describes a jam nut mechanism, which uses friction between two tightened nuts. Option B mentions a slotted clamping screw, which does not use a cotter pin retainer. Option C refers to a nylock nut, which uses a polymer insert for friction locking grip.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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