M Series

LEMO M Series Connectors – High-Performance, Lightweight, MIL-Spec Circular Connectors

The LEMO M Series is one of the world’s leading ranges of rugged, lightweight, MIL-spec circular connectors—engineered for demanding applications in avionics, defence, security, motorsport, robotics, and harsh-environment industrial systems.

Built to Meet MIL-DTL-38999 Performance

Designed to exceed the requirements of MIL-DTL-38999, the M Series delivers exceptional durability in a compact footprint—making it ideal for projects where weight, reliability, and environmental sealing are critical.

Highly Configurable Circular Connector System

The LEMO M Series gives engineers total flexibility with:

2 to 114 contacts
Multipole, USB, and fibre-optic options
6 keying orientations for secure, error-free mating
Extensive shell sizes and insert configurations

Perfect for custom system builds and precision integration.

Engineered for Extreme Environments

The M Series is designed to perform where ordinary connectors fail:

IP68 sealing for watertight reliability
Oil and fuel resistance for motorsport and defence
-50°C to +200°C operating temperature range
High resistance to sand, dust, pressure, and corrosion

Reliable Connectivity – Every Time

Crimp or print contacts for flexible assembly
Optional anti-vibration flange for high-shock environments
Excellent EMI/RFI shielding for clean signal integrity
Compatible with cables from 2–27 mm OD

Download the Full M Series Catalogue

Get complete specifications, technical data, and product variations in the official LEMO M Series catalogue.

Why Choose the LEMO M Series?

Because it combines ruggedness, precision, and versatility—making it one of the most trusted connector families for mission-critical applications worldwide.