Product review (5 stars): Inexpensive Replacement Part...
This works.  The thermal cut off has a screw hole and a little thin strip of metal that you insert into one of the existing screw holes and the screw holes on this component and the dryer screw hole should line up.  So you really need one screw (save the old screw for future needs).  This product is 1/3 the cost of the OEM stuff; no need to waste money.  And the OEM parts retailer will hang up on you when you ask them for the part number.