"Metal ring locking function" for the first in the industry
The FUJILOK U-NUT consists of a nut and friction ring (specialized spring). The friction ring is integrated with the top face of the nut by crimping.
"Locking effect" by Friction Ring
FUJILOK U-NUT is tightened on a bolt, the friction ring touches the bolt screw threads.
The friction ring then begins to bend along with the screw threads and press against the bolt screw threads.
Stress produced through a spring effect and Prevailing Torque (friction torque) caused by a reaction force that presses against the bolt thread are produced.
This will be locking operation.
Reason for choosing FUJILOK U-NUT
Easy to install
The same as general nuts, "FUJILOK U-NUT" is easy to install.
As it is made of metal, it is not affected by heat as compared with nylon insert nuts.
Prevents nuts from quickly coming off
Quick coming off can be prevented even if axial force drops. In addition, it is effective even in the middle position of the bolt.
Variety of shapes
Various shapes are available, such as Cap Type U-NUT and Weld Type U-NUT.
Variety of size
Thread sizes are from M3 up to M115. You can find your requested size.
Special order is available
Production with special shape is also available.