The Coneloc is an all-metal prevailing torque type self-locking nut. This type of nut is frequently called a stiffnut The
locking action is achieved by localised precision deformation of the thread
in the cone section on top of the nut. When the nut is tightened onto the
bolt, the thread is gripped on the flanks providing the locking action. This
nut is of property class 10 which means that it is suitable for use with
high tensile bolts of property class 10.9 and below. (That is, it can be
used with property class 10.9, 8.8, 6.8, 5.8, 5.6, 4.8, 4.6 or 3.6 bolts.)
The nuts meet the requirements of the BS EN ISO 2320 - 2008 standard
(Prevailing torque type steel hexagon nuts - mechanical and performance
requirements.) We sell as standard nuts that are electro zinc plated. As
with other types of all-metal self-locking nuts, the nut can be re-used and
still maintain a locking action (meeting the ISO 2320 requirements). To
achieve the full locking action of the nut it is recommended that at least
two bolt threads should protrude through the top of the nut. Coneloc is a
trade mark of Nuts Bolts Limited.
