A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

A locking device in which the bottom cylindrical portion is recessed

1.	A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
A.	Ring nut
B.	Castle nut
C.	Sawn nut
D.	Jam nut
Answer» B. Castle nut

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A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

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