MIL-C-38999

Technical Characteristics

• Thread Direction

  right-hand

• Overall Length

  1.320 inches maximum

• Overall Height

  1.562 inches nominal

• Unthreaded Mounting Hole Diameter

  0.123 inches minimum and 0.138 inches maximum

• Distance From Mounting Shoulder To Front Face

  0.815 inches minimum and 0.820 inches maximum

• Threaded Device Type

  back shell

• Mating End Quantity

  1

• Contact Position Arrangement Style

  brah 21-39 single mating end

• Contact Removability

  removable single mating end all contact groupings

• Shell Type

  solid

• Nominal Thread Length

  0.219 inches

• Contact Material

  copper alloy single mating end all contact groupings

• Contact Surface Treatment

  gold and silver single mating end all contact groupings

• Terminal Type

  crimp single mating end all contact groupings

• Shell Surface Treatment Document And Classification

  mil-c-26074,cl 3 or 4,grade b mil spec single treatment response

• Included Contact Quantity

  2 single mating end 1st contact grouping

• Included Contact Type

  round pin single mating end all contact groupings

• Iii Precious Material And Location

  contact surfaces gold and contact surfaces silver

• Iii Precious Material And Weight

  0.039 gold grains, troy and 0.039 silver grains, troy

• Iii Precious Material

  gold and silver

• Definitive Government Spec/Std Reference

  ms27656t21f39pa

• Non-Definitive Government Spec/Std Reference

  mil-c-38999

• Overall Width

  1.562 inches nominal

• Environmental Protection

  moisture proof and salt water resistant and vibration proof

• Center To Center Distance Between Mounting Facilities Parallel To Height

  1.250 inches nominal

• Distance Between Centerlines Of Mounting Facilities Parallel To Body Width

  1.250 inches nominal

• Polarization Method

  key, multiple key groove

• Insert Position In Deg

  342.0

• Connector Locking Method

  bayonet pin

• Thread Quantity Per Inch

  18

• Nominal Thread Size

  1.188 inches

• Terminal Location

  back single mating end all contact groupings

• Shell Material

  aluminum alloy

• Shell Surface Treatment

  nickel

• Included Contact Quantity

  37 single mating end 2nd contact grouping

• Manufacturers Code

  81349

• Manufacturers Code

  96906

• Test Data Document

  81349-mil-c-38999 specification

• Thread Series Designator

  unef

• Specification/Standard Data

  96906-ms27656 government standard

• Thread Class

  2a

• Body Style

  3g straight shape, external coupling