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Home » NEWEST Products » New by Manufacturer » LEMO » LEMO M Series Connectors
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LEMO Harsh Environment Ratchet Coupling Connector -  M Series


 LEMO M Series Harsh Environment Connector

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Additional Resources
 M Series Overview

M Series Datasheet

M Series Assembly Instructions

Learn More About LEMO M Series Sealed USB Plugs and Receptacles


Lemo Knurled Grip
LEMO 's Knurled grip is the plug with the lowest girth and weight. Great indoors and out.

LEMO artic grip
LEMO 's Artic grip was designed for applications where gloves are often worn. A sharp scalloped edge on the twist knob provides a sure grip.


The high performance LEMO M Series Harsh Environment Connector provides a ratchet locking, screw coupling system that enables a quick and secure coupling of the connectors for high vibration environments. When mated, the LEMO M series connectors are watertight to two meters for fifteen hours, achieving an IP68 rating. Plugs come with two grip designs: a standard knurl grip or an arctic grip to allow secure mating while wearing gloves. Receptacle styles include jam-nut or flange panel mount with crimp contacts, PCB pins, or in-line cable mount shells. LEMO M series Harsh Environment Ratchet Coupling Connector family provides full 360° shielding and high shell conductivity to ensure excellent EMI protection. The over-mold feature provides additional strain relief ensuring cable mount reliability. LEMO's M series is designed for energy, alternative energy, industrial automation, performance automotive, and other harsh environment applications that require robust performance in a lightweight and compact size.

  • Vibration resistant - vibration tends to tighten, not loosen
  • Quick-mating - 1/2 turn to seat
  • Excellent EMI protection - full 360º shielding and high shell conductivity
  • IP68 - watertight to two meters for fifteen hours
  • Oil and gas resistant
  • Single grip, standard knurl grip or arctic grip for use while wearing gloves
  • Laser engraved with batch number to ensure complete traceability

The M Series is ideally suited for use in harsh environment applications that require robust performance in a durable, lightweight, and compact size. Applications

  • Avionic control and sensors
  • Robotics and remote control
  • Hybrid and electric vehicle
  • Motorsports
  • Batteries and fuel cells
  • Communications radios
  • Health monitoring
  • Data fill devices
  • Field use rugged medical equipment
  • Modems and system modules
  • Man-pac electronics
  • Navigation systems
  • Night vision devices
  • Security and surveillance
  • Video camera and terminals
  • Unattended sensors




  • LEMO
  • Industrial|Military / Aero
  • Connectors|Connector-Automotive|Connector-Circular