MILITARY PART NUMBER INFORMATION. Military Part Numbering example: RW80U49R9FB12. MIL TYPE CHARACTERISTIC RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE. RW67 RW68 RW69 RW70 RW74 RW78 RW79 RW80 RW81 U= max. hotspot 275 °C. V= max. hotspot 350 °C. U Characteristic. 3 digit significant figure, followed by a multiplier. 49R9= 49.9 . 1000= 100 .