?Technician A says that the 20 in 1?4 x 20 signifies the total number of threads the fastener has. Technician B says that the 1?4 signifies the socket size of the fastener head. Who is right?

A. ?Technician A only 
B. ?Technician B only 
C. ?Both A and B
D. ?Neither A nor B


Answer: D

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