Series Available

Cylindrical

 • Amphenol 97 (Solder)

 • Amphenol 97 (Crimp)

 • Amphenol 97E (Env.)

 • Amphenol JT

 • Amphenol LJT

 • Amphenol TV

 • M5015 Solder

 • M5015 Crimp

 • M22992 Class L

 • M22992 Series QWLD

 • M26482 Series I

 • M26482 Series II

 • M26500

 • M27599 (Solder)

 • M28840

 • D38999 Series I

 • D38999 Series II

 • D38999 Series III

 • D38999 Series III RJ45

 • D38999 Series III USB

 • M81511 Series I & II

 • M83723 Series III

 • 80 Series Mighty Mouse

Rack & Panel

 • M55302

RF

 • M39012

 • View Catalog

Micro D-Sub

 • M83513

Backshell

 • M85049

Contacts & Termini

 • M39029

 • Coax, Twinax, Triax

 • M29504 Termini

Circuit Protection

 • Raychem PolySwitch

Tooling

 • Crimp Tools

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MIL-C-28840 Cylindrical Connectors

Description

MIL-C-28840 was developed to meet the Navy’s requirement for crimp front release contact connectors for shipboard signal applications. These connectors are environmentally sealed and completely fluid resistant.

MIL-C-28840 miniature circular connectors, meets high density, high shock circular connector requirements that meet and exceed most demanding environmental and RFI / EMI shielding requirements. Fluorosilicone rubber sealing provides fluid immersion protection. This series of connectors can be used with either discrete wires or jacketed cable. You have an option of ordering connectors with or without backshells. Principal use is for U.S. Navy electronic equipment applications.

Features & Benefits

  • RFI / EMI Shielding – RFI/EMI suppression is obtained by means of the spring fingers located in the plug. Additionally, a metal to metal bonding occurs when accessories are attached to the rear of the connector through a unique spline and ramp design system.
  • Quick Engagement – Double lead-rapid threads provide quick engagement and disengagement of the connector in 2 1/2 turns.
  • Scoop Proof – 100% scoop proof protection on all connectors prevents bent pins and inadvertent electrical contact whether the pins are mounted in the plug or the receptacle.
  • High Density – Maximum contact density is achieved without sacrificing the rugged design required for high shock and vibration while maintaining connector size to a minimum.
  • Multiple Keying – Locksmith keying arrangement allows for alternate insert positions preventing the possibility of mismating
  • Standard Contacts – Contact size 20 (M39029) is used in all inserts.
  • High Density – 9 shell sizes and 9 insert configurations with a maximum number of 155 size 20 contacts.
Popular M28840 Configurations
M28840/16AA1P3 M28840/16AA1P4 M28840/16AA1P5 M28840/16AA1P6
M28840/16AA1S1 M28840/16AA1S2 M28840/16AA1S3 M28840/16AB1E1
M28840/16AB1F1 M28840/16AB1F2 M28840/16AB1F3 M28840/16AB1G1
M28840/16AB1G2 M28840/16AB1G3 M28840/16AB1G4 M28840/16AB1P1
M28840/16AB1P2 M28840/16AB1P4 M28840/16AB1P5 M28840/16AB1P6
M28840/16AB1S1 M28840/16AB1S2 M28840/16AB1S3 M28840/16AB1S4
M28840/16AB1S5 M28840/16AB1S6 M28840/16AC1F1 M28840/16AC1F2
M28840/16AC1G1 M28840/16AC1G2 M28840/16AC1G3 M28840/16AC1G4
M28840/16AC1G5 M28840/16AC1P1 M28840/16AC1P2 M28840/16AC1P3
M28840/16AC1P4 M28840/16AC1P5 M28840/16AC1P6 M28840/16AC1S1
M28840/16AC1S2 M28840/16AC1S4 M28840/16AC1S5 M28840/16AC1S6
M28840/16AD1G1 M28840/16AD1G2 M28840/16AD1G3 M28840/16AD1G4
M28840/16AD1G5 M28840/16AD1P1 M28840/16AD1P2 M28840/16AD1P3
M28840/16AD1P4 M28840/16AD1S1 M28840/16AD1S2 M28840/16AD1S3
M28840/16AD1S4 M28840/16AD1S5 M28840/16AD1S6 M28840/16AE1F1
M28840/16AE1G1 M28840/16AE1G2 M28840/16AE1G3 M28840/16AE1G4
M28840/16AE1G5 M28840/16AE1G6 M28840/16AE1P1 M28840/16AE1P2
M28840/16AE1P3 M28840/16AE1P4 M28840/16AE1P5 M28840/16AE1P6
M28840/16AE1S1 M28840/16AE1S2 M28840/16AE1S3 M28840/16AE1S5
M28840/16AF1F1 M28840/16AF1F3 M28840/16AF1G1 M28840/16AF1G2
M28840/16AF1G3 M28840/16AF1G4 M28840/16AF1G5 M28840/16AF1P1
M28840/16AF1P2 M28840/16AF1P3 M28840/16AF1P4 M28840/16AF1P5
M28840/16AF1P6 M28840/16AF1S1 M28840/16AF1S2 M28840/16AF1S3
M28840/16AF1S6 M28840/16AG1B1 M28840/16AG1F1 M28840/16AG1G1

Other Popular Patterns: 2, 3, 4, 5