M - Rugged Ratchet coupling

LEMO lightweight, compact, high vibration resistant (Mil STD 202 & 810F), IP68 screw locking connector
M - Rugged Ratchet coupling
Harsh environments (IP68)
Ratchet coupling, strong resistance to shocks and vibrations
Stealth Anthracite coating
Light & compact construction
Robust Multi-Keying system with color coding
Main Features
Harsh environments (IP68)
Ratchet coupling, strong resistance to shocks and vibrations
Stealth Anthracite coating
Light & compact construction
Robust Multi-Keying system with color coding
Reliable High quality and performance interconnect solutions
Modular and custom made complete solutions
Worldwide presence with local experts, stock management and cable assembly everywhere

Form & Material

Environment
Broad metallic high quality circular connector range for rugged environments (IP68)
Latching system
Ratchet Coupling enabling easy fast easy yet secure and reliable frequent connect and disconnect, and with very strong resistance to shocks and vibrations
Keying system
Keying system allowing for a high contact density, with multiple key options and color coding to prevent mismating
Construction
Field proven solid, light & compact construction, oil and fuel resistant
Ergonomy
Ergonomic design with knurled or arctic grip patterns, scoop proof
Size and model
Various sizes and models including miniature, watertight and vaccumtight models, MIL-DTL-38999L backshell

Electrical configurations

Insert configurations
Large selection of insert configurations including high-density low voltage, high power, high-speed, coaxial and fibre optic contacts as well as hybrid solutions
Screening
360° screening for full EMC shielding
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Solutions Selection Guide
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M series catalog
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Product brief - High-speed data transfer
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Product brief - M series High Power
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Product brief - M series Multi coax solution
Other documents
Suitable applications
Motorsport
motorsport
Security & Defence
security defense
Transportation, Aerospace & UAV
transportation aerospace UAV
OPTIMA
Use the table to compare the 2 main series within the OPTIMA connector family and to identify the connector(s) best adapted to your specific requirements.
M - Rugged Ratchet coupling

M - Rugged Ratchet coupling

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F - Rugged Push-Pull

F - Rugged Push-Pull

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Description Description LEMO lightweight, compact, high vibration resistant (Mil STD 202 & 810F), IP68 screw locking connector Description LEMO lightweight, compact, high vibration resistant (Mil STD 810F), IP67 Push-Pull connector
Locking Locking Triple start, 3/4 turn rachet coupling Locking Push-Pull
Size Size 9 sizes from ø 11.1 to ø 34.0 mm (plugs) Size 9 sizes from ø 8.5 to ø 36.1 mm (plugs)
Keying Keying 6 keyway options Keying 4 keyway options
Shell Types Shell Types Over 40 shell styles Shell Types Over 12 shell styles​
Shell Material Shell Material Aluminium or Brass Shell Material Aluminium or Brass
Plating Plating Antracite nickel or Chrome Plating Antracite nickel or Chrome
Cable Diameter Cable Diameter 2.2 to 34 mm • 4 backshell options available Cable Diameter 2.2 to 34 mm • 1 backshell option
NB of contact NB of contact 3 to 114 NB of contact 3 to 66
AWG AWG LV 16 to 32 mm • Hpower 1 to 8 mm AWG 18 to 32 mm
Contact types Contact types Multipole • Coax • Fibre Optic • Fluidic Mixed • High power Contact types Multipole • Fibre Optic
Contact Termination Contact Termination Crimp / Print (PCB) Contact Termination Crimp / Print (PCB)
Data Protocols Data Protocols USB 2.0 / Eth Cat6 Data Protocols -
Sealing level Sealing level IP68 / hermetic sockets Sealing level IP68 / hermetic sockets
Temperature range Temperature range -55°C to 200°C Temperature range -55°C to 200°C
Mating Cycles Mating Cycles > 3000 Mating Cycles 300 / 5000 acc. to sizes/material
M - Rugged Ratchet coupling

In harsh environments connectors need to be reliable, strong and resistant to vibration. The M series, used in the aerospace, UAV, defence, and motorsport industries, uses a ratchet screw system for rapid and secure coupling. Lightweight and compact yet robust and oil/fuel resistant, the M series is available in a variety of sizes (including miniature), watertight and vacuum-tight models, threaded model compatible with standard MIL-DTL-38999L backshells. The keying system offers high contact density for secure signal transmission, and sensitive signals are protected by 360° EMC shielding. A large selection of insert configurations including high-density low voltage, high power, high-speed, coaxial and fibre optic contacts and as well as hybrid solutions is available. 

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No matter how harsh the environment may be, LEMO has a solution ready for you to implement today.

If not, we promise to relentlessly innovate and develop one for you. 
Please take a moment to reach out and describe your project, technical specifications and deadlines. We are standing by and looking forward to hearing from you - and adding your business to our thousands of longstanding satisfied customers, partners and employees - very soon.