Dual-Start ACME Miniature Threads Coupling connectors
Product Selector & 2M 3D files

Key features
  • Micro-miniature circular connector
  • Heavy Dual-Start ACME Thread 
  • 10 shells sizes from 05 to 21
  • More than 40 contacts arrangements, from 1 to 130 contacts
  • Two Plug Styles: Ratcheting and Anti-Decoupling
  • Battlefield Communication C5ISR
  • Grounded vehicles
  • Military avionics
  • Missiles & UAVS
Technical information

Product benefits :

  • Several receptacles style : Square flange, Jam nut, In-line… 
  • Fast coupling, fully mated in a 1 1/2 turn of the coupling nut
  • Low profile and miniature
  • Standard crimp versions using integrated backshells
  • Epoxy potted PC tails versions

Materials & Platings :

  • Aluminum : Olive drab Cadmium, Black Zinc Nickel, Nickel, Durmalon plated
  • Stainless Steel : Passivated, Nickel plated 

Contacts types & terminations :

  • More than 40 arrangements of contacts
  • Contacts sizes 23 to 12
  • Power, Signal, High Speed (#12)
  • Crimp, PC tails

Environmental Characteristics :

  • Up to 2 000 mating cycles with (-16) plugs, 500 with (-26)
  • -65°C to 150°C
  • From 48 to 500 hours for aluminum & stainless steel
  • IPX7 when mated and fully cabled

Electrical characteristics :

  • Shell to shell conductivity 2,5 mΩ max
  • Insulation resistance @Ambient : 5.103 mΩ
  • Contact rating from 5 to 23 Amps

"We have selected over 1000 Top Runners for our customers in Europe to provide top of the line quality services as for the standard MIL-DTL-38999 with improved lead times“

3D files


Catalog 2M Top Runners

Last update : Mon, 05/15/2023 - 16:52

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We offer several shell style to fit our customers need, such as Integrated Backshell, Stand-off (double flange shell) version for PC Tail contacts, or clinch nut for square flange receptacles ! Do not hesitate to consult us for any information or specific design.


The 2M range comes with plenty of accessories such as Backshells, Protection Caps, Strain Reliefs, Micro Band Adapters, Shrink Boots, Flange Gaskets etc. Consult the 2M catalog to find additional information on accessories for 2M connectors.

Any additional questions on how to choose protective caps or backshells for 2M Micro Miniature connectors? Contact our Technical Support team


Size 12, 16 & 20 contacts used on 2M layouts are defined in the SAE39029 standard. Pins are the same than series I, II & III and sockets are the same than 38999 series II connectors.

Any additional questions regarding our 2M Micro Miniature connectors? Check the 2M Micro Miniature product page or contact our Technical Support team


For the moment, there is no existing standard for 2M type products, but the drafting of this specification is in progress by the DLA and our products will be proposed for qualification as soon as it is possible.



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