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Variable Attenuator

NSN: 5985-01-298-3944 | Model: 12687A
ITAR Registered seal

A device for reducing the strength of an alternating current signal either continuously or in steps, without causing appreciable signal distortion, by maintaining substantially constant output and/or input impedance match. Continuously variable resistive devices must consist of at least two sections or one section with at least two rotating contacts. The item must have an attenuation rating. Includes tandem mounted variable resistors designed to function as an attenuator but whose terminals are not connected. See also resistor, vaiable (as modified).

NSN Properties and Flags
NATO Stock Number
Yes - ITAR Controlled
Application Design
Transmission line
Body Style
Coaxial type
Overall Length
1.980 inches
Overall Diameter
0.560 inches
Voltage Standing Wave Ratio
1.45 and 6.00
Coaxial Connector Series Designation
Power Rating
2.0 watts average
Overall Attenuation Range In Decibels
Impedance Rating In Ohms
50.0 input-output
Terminal Type And Quantity
1 connector, coaxial, female and 1 connector, coaxial, male
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE7M520T3356 2019-11-29 PMCM4 2 EA
SPE7M019T165M 2019-09-16 PMCM4 2 EA

Pricing and Availability

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NSN 5985-01-298-3944 Datasheet

Supply Class (FSC):
Related Equipment Waveguides Antennas
Cross Reference:
  • 12687A
  • 4108-14DB
  • 4108-14DB
Cage Codes:
  • Ballantine Laboratories Inc (CAGE 50423)
  • Fluke Electronics Corporation (CAGE 4U744)
  • Fluke Electronics Corp (CAGE 05276)
Schedule B & Trade:
  • Schedule B: 8529109000 (NAICS 334220)

    Antenna & antenna reflectors of all kinds; parts suitable for use soley or principally w/ apparatus of heading 8525 to 8528, nesoi

  • SITC: 76493

    Parts of television receivers, radiobroadcast receivers, transmission apparatus for radio telephony, telegraphy, broadcasting or television etc.

  • End Use: 21400

    Telecommunications equipment


P - Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of federal standard 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.


U - Precious metal content is unknown


- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    061700 - Elec appliances/instruments noi

  • WCC:

    658 - Electrical appliances, small

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    H - Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)

  • LTL:

    J - 100.0

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
  • AAC
  • Quantity per pack
  • Unit of Measure
  • Shelf Life
  • Classification Control
  • Repariability

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $262.85 to $438.08..
Does NSN 5985-01-298-3944 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Department Of The Navy, and Spain
What is the NIIN of NSN 5985-01-298-3944?
012983944 or 01-298-3944
Does NSN 5985-01-298-3944 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5985-01-298-3944?
Solicitation SPE7M520T3356 for qty 2 on 11/18/2019
When was this national stock number assigned to the federal catalog?
Apr 15, 1989