INCH-POUND
MIL-PRF-55339/49A
10 January 2005
SUPERSEDING
MIL-PRF-55339/49
2 May 1977
PERFORMANCE SPECIFICATION SHEET
ADAPTER, CONNECTOR, COAXIAL, RADIO FREQUENCY
(BETWEEN SERIES N JACK TO SERIES BNC PLUG)
This specification is approved for use by all Departments
and Agencies of the Department of Defe nse.
The requirements for acquiring the product described herein shall consist of this specification sheet and
MIL-PRF-55339.
Reference Series Contact
A BNC Pin
B N Socket
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are in parentheses.
3. Metric equivalents are given for information only.
4. All undimensioned pictorial representations are for reference purposes only.
5. Interface shall be in accordance with MIL-STD-348.
FIGURE 1. General configuration.
AMSC N/A FSC 5935
MIL-PRF-55339/49A
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DESIGN AND CONSTRUCTION:
General configuration: See figure 1.
Impedance: 50 ohms, nominal.
Working voltage:
Sea level: 500 Vrms.
70,000 feet (4.437 kPa): 125 Vrms
Frequency range: 0 to 4 GHz.
Temperature range: -65º to +165ºC.
PERFORMANCE:
Dimensions: See figure 1 and MIL-STD-348.
Center contact retention: Series BNC Series N
Axial force (lb, minimum) 6 (26.69 N) 6 (26.69 N)
Torque (in. lb, maximum) N/A N/A
Force to engage and disengage: Series BNC Series N
Longitudinal force (lb, maximum) 3.0 (13.34 N) N/A
Torque (in, lb, maximum) 2.5 (0.28 Nm) 6.0 (0.68 Nm)
Coupling proof torque: Not applicable.
Mating chara ct eristics:
Outer contact: Series BNC
Minimum test ring ID (in., maximum) .319 (8.10 mm)
Ring finish (microinche s) 16 (.406 µm)
Insertion force (lb, maximum) 5 (22.24 N)
Insertion depth (in., minimum) .093 (2.36 mm)
Number of insertions 1
Maximum test ring ID (in., minimum) .324 (8.23 mm)
Test ring finish (microinches) 16 (.406 µm)
Insertion depth (in., min) .031 (0.79 mm)
Number of insertions 1
MIL-PRF-55339/49A
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Center contact (socket): Series N
Oversize test pin diameter (inch, minimum) .074 (1.88 mm)
Insertion depth (inch, minimum) .125 (3.17 mm)
Number of insertions 1
Maximum test pin (insertion force test):
Steel test pin diameter (inch, minimum) .066 (1.68 mm)
Pin finish (microinches) 16 (.406 µm)
Insertion force (lb, maximum) 2 (8.90 Nm)
Number of insertions 1
Minimum test pin (withdrawal force):
Steel test pin dia (in., maximum) .063 (160 mm)
Pin finish (microinches) 16 (.406 µm)
Withdrawal force (oz, minimum) 2 (0.56 Nm)
Number of withdrawals 1
Permeability: <2.0
Seal:
Hermetic: Not applicable.
Pressurized: Not applicable.
Weatherproof: Not applicable.
Insulation resistance: 5,000 megohms, minimum.
VSWR: 1.35:1, max at .5 to 4 GHz.
RF leakage (total): -55 dB, min, 2 to 3 GHz.
RF insertion loss: .1 dB, max 3 GHz (.06 √F (GHz) dB max tested at 3 GHz).
Durability: 500 cycles minimum at 12 cycles/min maximum The connector shall meet the mating
characteristics and force to engage and disengage require ments.
Dielectric withstanding:
Test voltage: 1,500 Vrms, minimum (sea level).
MIL-PRF-55339/49A
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Contact resistance (milliohms, maximum).
Contact Initial After environment
Center 2.0 2.5
Outer 1.5 N/A
Outer (-70001) 3.0 N/A
Vibration, high frequency:
Interruptions: 1 microsecond (µs), max.
Shock: Test condit ion I .
Thermal shock: Test condi tion C.
Moisture resistan ce: 200 megohms, min.
Corona level:
Voltage: 375 V, minimum.
Altitude: 70,000 feet (4.437 kPa), minimum.
RF high potential withstanding voltage:
RF voltage: 1,000 Vrms. minimum.
Frequency: 5 MHz, minimum.
Salt spray (corrosion): Applicable.
Coupling mechanism retention force: 100 lb (444.8 2 N), minimu m.
Part or Identifying Number (PIN): M55339/49-00349 or:
PIN: M55339/49-70001 CAUTION: THIS PART H AS A NICKEL PLATED BODY AND IS NOT
FOR USE IN APPLICATIONS WHERE PASSIVE INTERMODULATION GENERATION (PIM) MAY
BE A CONCERN.
TABLE I. Cross reference of PINs.
PIN Superseded PIN or type designation 1/
M55339/49-00349 UG-349/U
1/ The superseded PIN or the type designation is for cross reference
only. Where a superseded PIN or type desig nation is not given,
none was assigned or will be assigned. The PIN M55339/49-00349
shall be used in all cases for marking an d identifying the adapter.
MIL-PRF-55339/49A
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Reference documents. In addition to MIL-PRF-55339, this document references the following:
MIL-STD-348
Changes from previous issue. Marginal notations are not use d in this revision to identify changes
with respect to the previous issue due to the extent of the changes.
CONCLUDING MATERIAL
Custodians: Preparing activity:
Army - CR DLA - CC
Navy - EC
Air Force - 11 (Project 5935-4657-033)
DLA - CC
Review activities:
Army - AR, AT, EA, MI
Navy - AS, MC, OS, SH
Air Force - 19, 99
NOTE: The activities listed above were interested in this documen t as of the date of this document.
Since organizations and responsibilities can change, you sho uld verify the currency of the information
above using the ASSIST Online database at http://assist.daps.dla.mil.
