This part is a kind of semiconductor called 851-00-xx-xxx-5x.
Function of this product has 851 Series Connector.
Manufacturers : ETC
Image and pinout :

Some of the text within the PDF file :
851 Series Applications Former connector for military applications. Now used in the fields of professional and general electronics. Description • Bayonet coupling • Environmental and hermetic versions • Solder, crimp, straight spills and wire wrap versions • Thermocouple contacts available • Cadmium free plating (Zinc Cobalt) version Standards MIL-C 26482 G Series 1 NFC 93422-He 301 B VG 95328 BS 9522 F 0017 GAM T1 list QPL approved (solder version) Characteristics Mechanical contact size 20 (Ø 1 mm) 16 (Ø 1.6 mm) crimp ≥ 68 N ≥ 113 N solder straight spill ww ≥ 68 N ≥ 113 N • Shell : • environmental version : aluminum alloy plating - olive green cadmium - black anodized - white cadmium - satin finish bright nickel - zinc cobalt (olive gre [ ... ]
851-00-xx-xxx-5x PDF Datasheet Download
