 
			 
			MCQOPTIONS
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				| 1. | The nut which has a cylindrical grooved collar at its lower end and this collar fits into a corresponding recess in the adjoining piece is named as. | 
| A. | Simmond’s locknut | 
| B. | Grooved nut | 
| C. | Castle nut | 
| D. | Sawn nut or wiles nut | 
| Answer» C. Castle nut | |