Dual pitches bolt realized. complete Anti-Loose mechanically.
Theory of Dr.Takemasu(Kyushu Univ.) is accomplish by Nissei Form Rolling Technologies.
*What is PERFECT LOCK ?
Tighten 2 kinds of nut(fine and course) into 1 bolt, and it never loosen against any vibration.
Comparison between PERFECT LOCK and standard bolt and nut.

Though a standard double nuts is depending upon only fliction,
PERFECT LOCK is the complete locking system structually.
Though anti loose bolt and nut by aplit cotter pin or welding
is not possible to use repeatedly.
Though 2 tool are necessary for double nuts in assembling,
1 tool is enough for PERFECT LOCK to lock.
PERFECT LOCK
Looseing action of the power nut tighten power by differen of pitches
so that it become complete LOCK.

Locked nuts can be loosen by 2 wrenches.
PERFECTLOCK realized complete Anti-loose and also
Nissei Form Rolling Technologies realized high productivity
and cost performance.
Please see with your own eyes.