Correct option is A
A
box nut is typically used in a
bench vice. The box nut is specially designed to transmit the force of the screw mechanism while keeping the jaws of the vice aligned. It is an
enclosed nut that ensures smooth operation and durability by protecting the internal threads from damage or dirt accumulation.
Hexagonal nuts are the most commonly used nuts in general fastening applications. However, they are
not suitable for bench vices as they do not provide the required enclosure and durability needed for the vice's screw mechanism.
Dome nuts (or acorn nuts) are used for aesthetic purposes and to protect the end of the bolt or stud. They are not designed for transmitting force in a vice mechanism.
