Osaka Forming Co Ltd's E-Lock series has excellent anti-loosening capability. Now the series is added with lock nut used for bearing. The nut no longer requires key processing on the shaft nor shake-proof washer, therefore reducing the cost for shaft fastening. Another feature of the nut is its capability to bear intense vibration.

In terms of the nut's structure, the previous 270-degree wing is changed into three 90-degree wings which reduce torque during fastening. Moreover, Each 90-degree wings connects with the bolt's threads and is 270 degrees away from another wing. As such, the stress and counterforce generated from spring effect strongly press against the bolt's threads, generating friction torque and preventing loosening or revolving.