To bring an existing black head detent pin up to the latest specification, unscrew the existing black head and remove the washer. Fit a metric M5 Nyloc Nut tightened to 4-5 Nm to the detent pin.
Important: Make sure the Nyloc nut is fully threaded onto the detent pin as shown. Be sure to hold the detent pin tightly - best done in a work bench vice - when tightening the nut so that the detent pin does not rotate. Use cardboard to protect the detent pin from scratching.
Check the latch function per TB23 before riding.
Watch the attached video.