描述：The 45100E22-21S50 from Amphenol is 451 series, MIL-DTL-26482 series I equivalent wall mount receptacle with 21 contacts. The 451 series miniature cylindrical connectors offer high density contact arrangements in a circular shell with salt spray exposure of 48hour, 500hour. These connectors have 5 key/keyway polarization with 3 point bayonet lock coupling for positive mating with no chance of cross plugging. Spring tension provided by a wave washer in the coupling nut ensures maintenance of interfacial seal between mating halves. Both the insert and main joint gasket are moulded from resilient neoprene insulator. These connectors are designed for harsh environments and have well-proven electrical capability to withstand extreme shock, exposure and vibration. The high reliability performance makes 451 series ideal for environmental sealing or pressurized applications. . Quick disconnect bayonet coupling for rapid mating and unmating . Intermateable, intermountable and interchangeable with all MIL-DTL-26482 connectors . 500 mating cycles . Operating temperature range from -55°C to +125°C . Insulation resistance is 5000Mohm at 25?C . Aluminium alloy body material with olive drab chromate over cadmium plating . Copper alloy solder socket contacts with gold plating