Used on aircraft static inverter,pc-15bc. for safety feature only, thermostat used to control blower motor. it will come on only when the heat sink temperature exceeds 165 deg f
2b all threaded hole thread class 1.656" overall length 2.390" overall width 32 all threaded hole thread quantity per inch rectangular unc all threaded hole thread series
2a single threaded stud thread class 0.614" overall length 40 single threaded stud thread quantity per inch plug unc single threaded stud thread series