Number of contacts Low Voltage
4
Wire Size/AWG
20 - 16
Gender
Standard
Plug
Plug - Straight
Locking system
Ratchet
Jacket cable outside diameter [mm]
6.50 - 13.00 mm
Size
2M

Electrical Configuration

Contact Termination Low voltage
Crimp
R (max)
3.6 mOhm
Insert configuration value
2M.304 - 4 Low Voltage
Insulator
L: PEEK
Rated current
15.5 Amps
Test voltage (kV rms) Contact-contact
1.55
Test voltage (kV rms) Contact-shell
1.55
Contact retention
40 N
Contact Type
Crimp
Max. Conductor
1 mm^2 (AWG 18)
Min. Conductor
0.5 mm^2 (AWG 20)
Bucket Dia.
1.4 mm (0.055in)
Contact Dia.
1.3 mm (0.051in)
Number of contacts Low Voltage
4
Wire Size/AWG
20 - 16
Gender
Standard

Form & Material

Shell style / Model id
FM - Straight plug, key (N) or keys (P, R, S, T, U, V, W and X) with knurled grip and MIL-DTL-38999L shell thread
Plug
Straight
Housing material
Aluminium (nickel plated [SAE AMS QQ N 290], anthracite color) shell and nut, other pieces bronze/brass
Locking system
Ratchet
Keying
3 keys (beta=165, gamma=30, plug: male contacts, receptacle: female contacts)
Weight
9.3 g

Environment

Technical domain
Motorsport, Security and Defence, Transportation, Aerospace and UAV
Environmental protection (IP rating)
IP68
Minimal temperature
-20°C / +200°C
EMI Shielding EIA 364-66A
>= 80 dB (1 GHz), >=70 dB (3 GHz), >= 58 dB (6 GHz), >= 40 dB (10 GHz)
Gunfire vibration
25 Hz - 2000 Hz, 3 axis (Apache helicopter)
Humidity (max)
21 days at 95%
Lighting strike EIA 364-76
10K amps - 6 times
Shock Resistance
300 g [ 3 ms]
Thermal shock
5 cycles: -65°C to +150°C
Vibration-Random
37.8 g rms - 3 axes, 4 hr amb [50 Hz - 2000 Hz]
Vibration-Sine
30 g, 3 axes, 12 hr [10 Hz - 2000 Hz]
Salt Spray Corrosion
max. 48 hr

Cable fixation

Cable termination protection
For backshell MIL-DTL-38999M
Fixation type
MIL-DTL-38999M
Jacket cable outside diameter [mm]
6.50 - 13.00 mm

Technical plans

https://web.lemo.com/img/Illustrations/m/types/2m_304_m.gif
https://web.lemo.com/img/Illustrations/m/models/fmn_m.gif
https://web.lemo.com/img/Illustrations/m/keys/n.gif

Dimensions

A C e Ls Lr P
mm. 17.6 17.2 M15x1.0 26.4 26.4 3.9
in. 0.69 0.68 1.04 1.04 0.15
icon pdf
M series catalog
icon pdf
Solutions Selection Guide
icon pdf
Product brief - High-speed data transfer
icon pdf
Product brief - M series High Power
icon pdf
Product brief - M series Multi coax solution
Other documents
M - Rugged Ratchet coupling
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
Cable Assembly UK
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