The base code '3476L14-19' specifies a MIL-DTL-26482 Series II straight plug connector ('3476') with electroless nickel plating ('L'), a shell size of 14, and an insert arrangement of 14-19, indicating 19 contacts. The suffix 'S' indicates that the connector has socket (female) contacts. MS identifies this as a US aerospace/military hardware standard, specifically a Military Specification (MIL-SPEC) circular connector. Governed by the MS standard series, administered by Military Standards.