MS5015 / MS3108A 204S / MS3102A 204P — 204 4‑Core (4‑Pin) U.S. Military Standard Aviation Plug & Socket Connector A rugged, U.S. military standard 4‑pin connector pair designed for dependable electrical connections where reliability matters. This product line includes the MS3102A 20‑4P plug and the MS3108A 20‑4S socket (cross‑referenced with MS5015), providing a compact, 4‑core solution for power and signal wiring in demanding applications. Key benefits — why you need it Proven compatibility with MS series military connectors ensures straightforward replacement or integration in existing installations. Four pins (four cores) allow combined power and signal wiring in a single, compact connector to reduce harness complexity. Military‑grade design delivers consistent, repeatable mating for reliable electrical contact in industrial and aerospace environments. Key attributes Models: MS5015; MS3108A 20‑4S (socket); MS3102A 20‑4P (plug) Contact count: 4 cores / 4 pins Shell size: 20‑4 series (20 shell with 4 contacts) Standard: U.S. Military (MS) series — designed for interchangeability with MS 20‑4 connectors Functionality: Plug and mating socket option for field or panel installation; supports power, signal, or combined circuits What it solves Simplifies wiring by combining multiple conductors into a single, secure connection point. Eliminates uncertainty when replacing or upgrading connectors by using standard MS part numbers for reliable interchangeability. Reduces downtime by providing a robust connector that maintains good contact under vibration and repeated mating cycles. Typical applications Aircraft and avionics wiring harnesses where MS‑series compatibility is required. Military and ground vehicles for power distribution and signal interconnects. Industrial control panels, test equipment, and instrumentation that require compact, multi‑core connectors. Installation and usage notes Available as plug (MS3102A 20‑4P) and socket (MS3108A 20‑4S / MS5015) to suit panel or cable mounting needs. Intended for use with four conductors; wiring should follow the system's pin numbering and electrical specifications. Use appropriate crimp or solder contacts and follow standard assembly practices for MS‑series connectors to ensure reliable performance. considerations Confirm compatibility with existing MS‑series parts in your system (MS3102A/MS3108A/MS5015 20‑4). Specify plug or socket version depending on panel or cable termination requirements. A straightforward, military‑standard 4‑pin connector choice for technicians and engineers who need interchangeability, compact multi‑core wiring, and dependable electrical connections.