They are used for bearings fixation in
machines and equipment which require high precision, for
example in lathes, grinding lathes and mills.
These nuts have three brass pins to lock them on the
shaft , divided
in angles, which are pressed against the shaft
by screws. The pins inclination are equal to the
thread angle so the nuts are not exposed to
axial loads, making the nut tightening at the
exact grip position possible.
