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.

If you wish to download a copy of this video for viewing on your computer when not on the Internet. Please click on this link ( 9870 KB).

Also of potential interest:
Why nuts and bolts come loose

Tests on the double nut system of locking
Tests on helical spring washers