Correct option is B
A
die nut is a special type of threading tool used primarily for
cleaning, repairing, and restoring damaged or rusted threads on bolts, rods, and studs.
· It is
not designed for cutting new threads but rather for
reconditioning existing ones.
· It
removes rust, dirt, and minor deformities in the threads.
· Commonly used in
maintenance and repair operations.
