Connector's integration on panels - Circular connectors

Article author
Lorenzo Rouge
  • Updated

Pannel drilling

You can find your connector's panel drilling through below links:

MIL-DTL-38999 series III (TV-CTV) : catalogue TV-CTV (amphenol socapex) page 16

MIL-DTL-38999 series II (JT) : catalogue-jt.pdf ( page 14

MIL-DTL-38999 series I (LJT) : catalogue_ljt_he308.pdf ( page 14

RNJ : catalogue_rnj.pdf ( page 13

RNJLP : catalogue_rnj_lp.pdf ( page 15

PT/451 : catalogue_pt451.pdf (amphenol socapex) page 66

RJF : catalogue RJF (amphenol socapex) page 18

RJFTV : catalogue RJFTV (amphenol socapex) page 26

USBFTV : catalogue USBFTV (amphenol socapex) page 89


Jam nut tightening torque

For jam nut receptacles of series :

  • MIL-DTL-38999 series I and III (TV-CTV and LJT)

  • Powersafe

  • RNJ(LP)

  • SC39



  • TVµCOM

Jam nut tightening torque value will be as follows:


Shell sizes : RJFTV = 19 / USBFTV = 15 / TVµCOM = 11

    • For 387TV series jam nut receptacles, apply torque values of shell size 9.
    • For reduced flange versions (F311, F312, F058, F059) and other versions with castle nut, torque value is the same as standard ones.
    • Apply the torque with recommended tool from the catalog.

For jam nut receptacles from series :

  • MIL-DTL-38999 series II

  • PT/451

  • RJF

Tightening torque will be as follows:


Shell sizes PT/451 : RJF = 18


For 2M Micro Miniature series :


Important note :

We recommend a first tightening with above torque values, and then a second tightening after 24 hours for better vibration resistance.

In the case of your jam nut receptacles are subjected to high levels of vibration, certain solutions are available such as :

  • Use of safety wire :


  • Use of thread lock -> Risk that the connector won't be removable anymore


  • For square flange receptacles, you should apply standard M3 tightening torque on the screws.



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