If you look around my website, you can see I have a number of different toroidal AC power transformers, many WITHOUT the mounting kits.
After sorting through my boxes and boxes of left over production spare parts, I have found some 3 piece (pad/bolt/top steel washer) mounting kits and some rubber pads for use with potted cores on LARGE toroids. It is advisable to use potted cores with the large toroids because if a steel top cap is used, it can cause damage to the winding insulation wrap or the windings themselves.
So here we have JUST the rubber base pad ...
SAFETY CAUTION: When mounting toroidal transformers think carefully about what you are doing! Remember that it is important that your transformer be mounted in such a way that the mounting screw and the metal chassis will not form a closed loop through the center and thereby create a shorted turn on the transformer Believe me, this is NOT a good thing to do!
TOROIDAL TRANSFORMER - Mounting Component
Rubber base pad ONLY
Machine cut (smooth edge)
DIMENSIONS: 178mm Diameter x 1.9mm Thick
Centre hole has been punched, 6.5mm diameter
Rubber (not plastic)
COSMETIC CONDITION:
NEW Old Stock
CLEAN
Slight discolouration due to not be stored in a sealed pack previously
Now sitting on a stiff cardboard base and sealed in a clear plastic packet