... Bimetallic Thermostat DESCRIPTIONPRODUCT COVERED:USR, CNR, Component -Temperature Regulating Thermostat, Model series XWX -WK, f/b -, f/b any two numbers ... the Recognized Company name or Trademark or File Number and model designation. Electrical ratings are optional. Terminals - See Section General ... , 7 mm ID and 12 mm long. 18. PC Plate - R/C (QMFZ2), manufactured by E I DUPONT DE NEMOURS & CO INC ...