MIL-DTL-38999 Series II

MIL-DTL-38999 Series II connectors feature a bayonet coupling mechanism with lower profile design and rear-removable crimp contact retention system. These connectors were designed for military and commercial applications where the prime requirements are lower profile and lighter weight.

Reduction of both size and weight were achieved through the use of thinner shell walls and length restrictions. These design restrictions reduced the RFI attenuation characteristics and the “scoop” protection, while yielding an excellent general purpose, lightweight connector. Compared to Series I, Series II connectors achieve up to 20% reduction in mated pair length, up to 39% reduction in outside diameter and up to 40% reduction in weight (128 pin mated pair).

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

Plugs are available in two designs, with and without RFI grounding.

Fifty-two insert arrangements per MIL-STD-1560 are tooled and qualified to MIL-DTL-38999 Series II, utilizing 3 to 128 M39029 contacts. Contacts come in sizes 22D, 22M, 22, 20, 16 and 12, terminating wire sizes from 28 to 12 gauge.

Series Prefix: MS27472, MS27473, MS27474, MS27484, MS27497, MS27499, MS27500, MS27508 and MS27513

FEATURES AND BENEFITS

  • Contact Protection
  • Quick Positive Coupling
  • Error Proof Alternate Positioning
  • EMI Shielding
  • Nine Shell Sizes and a Variety of Shell Styles
  • Hermetic

Series Applications: High-performance military aircraft, Commercial airlines, Communications equipment, Missiles, Test equipment, Ships

View All MIL-DTL-38999 Series II Products »

Ordering Guide

MS27473 T 14 B 35 S B

BASIC PART NUMBER

MS27472 – WALL MOUNT RECEPTACLE
MS27473 – STRAIGHT PLUG
MS27474 – JAM NUT RECEPTACLE
MS27484 – STRAIGHT PLUG, EMI GROUNDING
MS27497 – WALL MOUNT RECEPTACLE, BACK PANEL MOUNT
MS27499 – BOX MOUNT RECEPTACLE
MS27656 – BOX MOUNT RECEPTACLE, BACK PANEL MOUNT

SHELL FINISH

T – ENVIRONMENTAL WITH REAR ACCESSORY TEETH
E – ENVIRONMENTAL W/GROMMET NUT (INACTIVE)

SHELL SIZE

8 – 24 (EVEN NUMBERS)

SHELL FINISH

A – BRIGHT CADMIUM
B – OLIVE DRAB CADMIUM
F – ELECTROLESS NICKEL

INSERT ARRANGEMENT

SEE CHART

CONTACT STYLE

P – PIN, S – SOCKET, A – PIN LESS CONTACTS, B – SOCKET LESS CONTACTS

POLARIZATION

BLANK – NORMAL, A, B, C, D
INSERT CHART
INSERT 
ARRANGEMENT
TOTAL
CONTACTS
22D GA20 GA16 GA12 GA
  8-35  6  6   
  8-98  3   3  
  10-5  5   5  
  10-35  13  13   
  10-98  6   6  
  10-99  7    7  
  12-4  4    4 
  12-8  8   8  
  12-35  22  22   
  12-98  10   10  
  14-5  15     5 
  14-15  15   14  1 
  14-18  18   18  
  14-19  19   19  
  14-35  55  55   
  14-97  12   8  4 
  16-6  6     6
  16-8  8    8 
  16-26  26   26  
  16-35  55  55   
  16-99  23   21  2 
  18-11  11     1 
  18-32  32   32  
  18-35  79  79   
  20-11  11     11
  20-16  16    16 
  20-35  79  79   
  20-39  39   37  2 
  20-41  41   41  
  22-21  21    21 
  22-35  100  100   
  22-53  53   53  
  22-55  55   55  
  24-19  19     19
  24-24  24    12  12
  24-29  9   29  29 
  24-35  128  128   
  24-43  43   23  20 
  24-61  61   61  
ACCESSORIES
CONTACTSDESCRIPTION 
  MS39029/58-360  22D GA PIN 
  MS39029/57-354  22D GA SKT 
  MS39029/58-363  20 GA PIN 
  MS39029/57-357  20 GA SKT 
  MS39029/58-364  16 GA SKT 
  MS39029/57-358  16 GA SKT  
  MS39029/58-365  12 GA PIN 
  MS39029/57-359  12 GA SKT 
TOOLSDESCRIPTION 
  M81969/14-09  22D GA INS/RMV 
  M81969/14-02  20 GA INS/RMV 
  M81969/14-03  16 GA INS/RMV 
  M81969/14-04  12 GA INS/RMV 
  M22520/2-01  CRIMPER 22D GA 
  M22520/2-07  TURRET 22D GA 
  M22520/1-01  CRIMPER 20/16/12 GA 
  M22520/1-04  TURRET 20/16/12 GA 
STRAIGHT BACKSHELLSALTERNATESHELL SIZE
  M85049/49-2-08*  MS27506*8-2  9
  M85049/49-2-10*  MS27506*10-2  11
  M85049/49-2-12*  MS27506*12-2  13
  M85049/49-2-14*  MS27506*14-2  15
  M85049/49-2-16*  MS27506*16-2  17
  M85049/49-2-18*  MS27506*18-2  19
  M85049/49-2-20*  MS27506*20-2  21
  M85049/49-2-22*  MS27506*22-2  23
  M85049/49-2-24*  MS27506*24-2  25
    
90 DEGREE BACKSHELLSALTERNATESHELL SIZE
  M85049/47*08  MS27507*8  9
  M85049/47*10  MS27507*10  11
  M85049/47*12  MS27507*12  13
  M85049/47*14  MS27507*14  15
  M85049/47*16  MS27507*16  17
  M85049/47*18  MS27507*18  19
  M85049/47*20  MS27507*20  21
  M85049/47*22  MS27507*22  23
  M85049/47*24  MS27507*24  25
*SEE FINISH TABLE  
FINISH TABLE
M85049/49,47
MS27506,7FINISH
  –  A  BRIGHT CAD
  W  B  OLIVE DRAB
  A  C  BLACK ANODIZE
  N  F  ELECTROLESS NICKEL