Twice in 2 weeks problems due to captive nuts dropping off and landing in
mains/ 450V supply areas of combo units.

These days , when coming across any captive nuts, I tend to wrap some
gaffer/duck/duct tape around and 2 pierce throughs, for the bolt - any other
ideas?

First one due to owner tinkering and not knowing that he'd dislodged an edge
wrap-around type one, when he re-fitted in casing. Just replaced th e bolt
into free air.

This one (apparently) dislodged itself. The type with 2 diametrically
opposite tangs that engage in a square hole in the chassis and a square nut
floating in the captive part.
Can anyone say the following is possible ever witnessed? Unnoticed, bolt
undoes , due to vibration and protrudes outwards. Normal handling of the
case or knocking in transport, the protruding head of bolt is pushed
inwards, releasing the tangs, captive nut then continues undoing, in use,
till free.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/