MIL-DTL-38999 Series I

Part Number Information
Part #: Price/Availability:
MS274 Aero-Electric Buy Now
MS275 Aero-Electric Buy Now
MS276 Aero-Electric Buy Now

MIL-DTL-38999 Series I is a bayonet coupling subminiature configuration with high contact density, ideal for smaller wire gauge, general-purpose applications. These environment resisting connectors are 100% “scoop-proof.” Pins are recessed in elongated shells to prevent the possibility of bending contacts when plugs are scooped into the mating receptacles.

This family of connectors is offered in 5 receptacle-mounting styles. They include square flange receptacles, for both front and rear panel (wall) mounting; square flange receptacles, for both front and rear box mounting; and jam nut receptacles which incorporate “O” ring seals, designed for rear panel “ D” hole mounting.


Standard plugs provide RFI protection by incorporating a continuous strip of attached grounding fingers attenuating interference up to 1 GHz.


  • Universal I/R Tool
  • Scoop-Proof Design
  • Closed-Entry Socket Insert
  • Interfacial Pin Insert Seal
  • Elastomer Wire Sealing Grommet
  • Superior Contact Stability
  • Shell Polarization