Video on the Junkers Test

Self-Loosening of Threaded Fasteners

A video is presented here that shows the principles behind the Junkers test and a test being conducted.

Other content related to this video is presented below:

Why nuts and bolts come loose
Poster on why nuts and bolts can come loose
Tests on the double nut system of locking
Tests on helical spring washers
Vibrational Detachment of Threaded Fasteners
Non-Rotational Loosening of Nuts and Bolts
Preload Loss from Embedding in Bolted Joints
Preload Loss from Stress Relaxation in Bolted Joints
Bolt Self-Loosening and the Critical Slip Distance