M20 x 2.5 Stainless A4 Slottle Lock Nut (Castle Nut)

Description

Often referred to as castle
nuts,
these locknuts are for light duty locking
applications.
They’re not recommended for use on parts exposed to high
vibration,
because the pin is prone to shearing under prolonged
stress.
To
secure,
insert a cotter pin or safety wire through a hole drilled through the
screw,
bolt,
stud,
or
rod.