Arctic fox<br>Polar foxes have the warmest fur of all mammals.<br><br>Polar foxes have the warmest fur of all mammals. 70% of it consists of thick undercoat. It is the only wild dog to change fur colours twice a year.
In winter, it is white as snow and in summer brown. This way, it is well camouflaged even in the tundra after the snow has melted.<br><br>Fun fact<br>Polar foxes have thick fur even on their paws. It keeps them warm and provides secure footing.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-733-6616, indicating validated use in U.S. government and defense logistics supply chains.
| body_width | 1.650 INCHES NOMINAL IN |
| body_height | 2.530 INCHES NOMINAL IN |
| body_length | 2.090 INCHES NOMINAL IN |
| inclosure_type | OPEN |
| overall_height | 1.570 INCHES MAXIMUM IN |
| mounting_method | THREADED STUD(S) SINGLE GROUP |
| frequency_rating | 45.0 HERTZ MINIMUM AND 450.0 HERTZ MAXIMUM SINGLE COMPONENT |
| special_features | PRESSURE:M3.0 TO 90.0 PSIG,PROOF 180 PSIG,BURST 270 PSIG |
| nominal_thread_size | 0.138 INCHES SINGLE GROUP IN |
| reliability_indicator | NOT ESTABLISHED |
| maximum_operating_temp | 125.0 CELSIUS DEGC |
| end_item_identification | MH-53E HELO |
| NSN | 5305-00-733-6616 |