MS27480 E  10  A  6  P  B MIL SPECIFICATION CLASS SHELL SIZE POLARIZATION CONTACT STYLE INSERT ARRANGEMENT FINISH MS27472 Wall mount receptacle  MS27484 Straight plug, EMI grounding MS27473 Straight plug  MS27497 Wall receptacle, back panel mounting MS27474 Jam nut receptacle  MS27499 Box mounting receptacle MS27475 Hermetic wall mount receptacle  MS27500 90° Plug (note 1) MS27476 Hermetic box mount receptacle  MS27503 Hermetic solder mount receptacle (note 1) MS27477 Hermetic jam nut receptacle  MS27504 Box mount receptacle (note 1) MS27478 Hermetic solder mount receptacle  MS27508 Box mount receptacle, back panel mounting MS27479 Wall mount receptacle (note 1)  MS27513 Box mount receptacle, long grommet MS27480 Straight plug(note 1)  MS27664 Wall mount receptacle, back panel mounting  MS27481 Jam nut receptacle (note 1)  (note 1) MS27482 Hermetic wall mount receptacle (note 1)  MS27667 Thru-bulkhead receptacle MS27483 Hermetic jam nut receptacle (note 1) NOTE 1. Active  Supersedes MS27472 MS27479 MS27473 MS27480 MS27474 MS27481 MS27475 MS27482 MS27477 MS27483 MS27473 with MS27507 elbow  MS27500 MS27478 MS27503 MS27499 MS27504 MS27497 MS27664 CLASS E Environment-resisting box and thru-bulkhead mounting types only (see class T) P Potting—includes potting form and short rear grommet T Environment-resisting wall and jam-nut mounting receptacle and plug types: thread and teeth for  accessory attachment Y Hermetically sealed FINISH A Silver to light iridescent yellow color cadmium plate  over nickel (conductive) –65 °C to +150 °C (inactive for new design)  B Olive drab cadmium plate over suitable underplate  (conductive), –65 °C to 175 °C C Anodic (nonconductive), –65 °C to + 175 °C D Fused tin, carbon steel(conductive), –65 °C to +150 °C E Corrosion resistant steel (cres), passivated (conductive), –65 °C to +200 °C F Electroless nickel coating (conductive), –65 °C to  +200 °C N Hermetic seal or environment resisting cres  (conductive plating), –65 °C to +200 °C CONTACT STYLE A Without pin contacts B Without socket contacts C Feed through P Pin contact—including hermetics with solder cups S Socket contacts—including hermetics with solder cups X Pin contacts with eyelet (hermetic) Z Socket contacts with eyelet (hermetic) POLARIZATION A, B Normal—no letter required C, or D  Figure 9-159.  MS connector information sheet.  Module blocks are types of junctions that accept crimped  contacts similar to those on connectors. Some use internal  busing to provide a variety of circuit arrangements. They  are useful where a number of wires are connected for power  or signal distribution. When used as grounding modules,  they save and reduce hardware installation on the aircraft.  Standardized modules are available with wire end grommet  seals for environmental applications and are track mounted.  Function module blocks are used to provide an easily  wired package for environment-resistant mounting of small  resistors, diodes, filters, and suppression networks. In-line terminal junctions are sometimes used in lieu of a connector  9-94