PLB v2 System

How PLBv2 Works
The PLB v2 system consists of a dual-thread bolt or screw, two nuts with different thread lead angles, and a lock washer.
The inner nut, with a larger lead angle on the bolt, is a multiple-thread nut; the outer nut on the bolt, is a single-thread nut.
When PLB v2 is subjected to vibration, or a loosening force of any kind, the force initiates the loosening of the inner nut. The slow-moving outer nut will block the inner nut's progression, forming a mechanical lock that is the secret to PLB v2's anti-loosening design.
No other fastening system in the world uses this theory.
This mechanical locking mechanism is our secret performance development to other systems using only high torque and "friction" to prevent loosening. The PLBv2 System creates the best benefits for users, including high anti-loosening force, ease of maintenance, and extensive reusability...
To user
・Proven to provide optimum performance using the ISO 16130 vibration testing process

・Easy to install and remove with standard tools(The joint is secured in ONE action!)

・ Low maintenance cost

・The stronger the vibration, the better the PLB v2 system performs.

・Test for yourself, Samples can be provided in most cases*

We want to be your Solution Provider:
Do you have Loosening Joints? Nissei will provide up to 10 free PLBv2 System Samples to test in your application.
We ask only that you describe your assembly, process, and issues, provide the Bolt Specifications (Diameter, Length, Grade, Head Size, etc.) … Then follow up with test data comparing the past issues and PLBv2 performance.