DTM Series Plug with B Keying. Deutsch DTM Series connectors are ideal for transport and other harsh environment signal connector applications. THey are often used in engine compartments and transmission tunnels. The DTM series features a smaller contact and enhanced design in comparison to the DT series connector. Features and Benefits. B keyed Connector Tactile and audible connector mating Rugged thermoplastic connector housing Hand insertable/removable contacts Operating temperature range: -55 +125 °C Dielecric withstand voltage 1500 V ac Nickel plated copper alloy contacts (available separately) Positive contact retention Suitable for Size 20 Contacts. Available in this Range. Stock No. ; 724-2579 724-2579 is a is a B-Keyed 12 way Plug Housing for Socket Contacts Stock No. ; 724-2585 724-2585 is a is a B-Keyed 12 way Plug Housing for Socket Contacts with Boot Adaptor