PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1-439Attenuator,variable

Kay Elemetrics Corporation · NSN 5985-01-178-8842 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-178-8842 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-178-8842. Primary manufacturer part number: 1-439.
Features
  • Attenuator,variable — FSC 5985
  • Frequency Range: 0.000 HERTZ MINIMUM AND 1.000 GIGAHERTZ MAXIMUM
  • Voltage Standing Wave Ratio: 1.20 AND 1.40
  • Power Rating: 1.0 WATTS AVERAGE
  • Overall Attenuation Range in Decibels: +0.0 TO 22.1
  • Attenuation Variation Method: STEPPED
  • Application Design: TRANSMISSION LINE
  • Attenuation Per Step in Decibels: 0.1 AND 0.2 AND 0.3 AND 0.5 AND 1.0 AND 2.0 AND 3.0 AND 5.0 AND 10.0
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,variable, cataloged under National Stock Number 5985-01-178-8842, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Kay Elemetrics Corporation. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-178-8842
Primary Part Number1-439
Item NameAttenuator,variable
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerKay Elemetrics Corporation
StatusACTIVE
Frequency Range0.000 HERTZ MINIMUM AND 1.000 GIGAHERTZ MAXIMUM
Voltage Standing Wave Ratio1.20 AND 1.40
Power Rating1.0 WATTS AVERAGE
Overall Attenuation Range in Decibels+0.0 TO 22.1
Attenuation Variation MethodSTEPPED
Application DesignTRANSMISSION LINE
Attenuation Per Step in Decibels0.1 AND 0.2 AND 0.3 AND 0.5 AND 1.0 AND 2.0 AND 3.0 AND 5.0 AND 10.0
Impedance Rating in Ohms50.0 INPUT-OUTPUT
Step Position Quantity9
Coaxial Connector Series DesignationBNC
Terminal Type and Quantity2 CONNECTOR, COAXIAL, FEMALE
Adjustment Device Type and Quantity9 TOGGLE
Body StyleCOAXIAL TYPE
Overall Attenuation Accuracy in Decibels-0.30 TO 0.30
Insertion Loss at Minimum Attenuation in Maximum Decibels0.5
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-5356 INTERCHANGEABLE
Bearing,roller,tapered
5305-00-208-0042A1439 INTERCHANGEABLE
Screw,machine
Smith Meter Inc Parts Opn
5950-00-492-9809BE10317-001 INTERCHANGEABLE
Transformer,power
Basler Electric Co
5935-00-508-32661439 INTERCHANGEABLE
Adapter,socket,plug-in Electroni
Vector Electronics & Technology Inc
5133-00-618-6903 INTERCHANGEABLE
Drill Blank Set
5305-00-804-275861191 INTERCHANGEABLE
Setscrew
Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company
5930-00-844-0692SC-B-83087 INTERCHANGEABLE
Switch,push
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5996-00-945-4234R354009-1 INTERCHANGEABLE
Amplifier,direct Current
Raytheon Company
3405-01-062-75011439 INTERCHANGEABLE
Disc,friction
Doall Baltimore Company
6515-01-256-46121439 INTERCHANGEABLE
Bag,ostomy
Hollister Inc
Cross-Reference Index
Part NumberManufacturer
1-439 PRIMARY Kay Elemetrics Corporation (USA)
89099115 Thales Las France SAS (FRA)
Related Parts
3110-00-100-5356INTERCHANGEABLE
BEARING,ROLLER,TAPERED
5305-00-208-0042INTERCHANGEABLE
SCREW,MACHINE
A1439
5950-00-492-9809INTERCHANGEABLE
TRANSFORMER,POWER
BE10317-001
5935-00-508-3266INTERCHANGEABLE
ADAPTER,SOCKET,PLUG-IN ELECTRONI
1439
5133-00-618-6903INTERCHANGEABLE
DRILL BLANK SET
5305-00-804-2758INTERCHANGEABLE
SETSCREW
61191
5930-00-844-0692INTERCHANGEABLE
SWITCH,PUSH
SC-B-83087
5996-00-945-4234INTERCHANGEABLE
AMPLIFIER,DIRECT CURRENT
R354009-1
3405-01-062-7501INTERCHANGEABLE
DISC,FRICTION
1439
6515-01-256-4612INTERCHANGEABLE
BAG,OSTOMY
1439
6760-01-439-4162INTERCHANGEABLE
LENS,CAMERA,GENERAL PHOTOGRAPHIC
1439
5136-01-652-0335INTERCHANGEABLE
TAP,THREAD CUTTING
1439

Frequently Asked Questions

What is NSN 5985-01-178-8842?

NSN 5985-01-178-8842 is a Attenuator,variable, manufactured by Kay Elemetrics Corporation, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-178-8842?

NSN 5985-01-178-8842 has 2 cross-referenced part numbers: 1-439 (Kay Elemetrics Corporation), 89099115 (Thales Las France SAS).

What NSN replaces 5985-01-178-8842?

There are 12 known substitutes for 5985-01-178-8842: 3110-00-100-5356, 5305-00-208-0042, 5950-00-492-9809 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1-439?

Key specifications for 1-439: Frequency Range: 0.000 HERTZ MINIMUM AND 1.000 GIGAHERTZ MAXIMUM; Voltage Standing Wave Ratio: 1.20 AND 1.40; Power Rating: 1.0 WATTS AVERAGE; Overall Attenuation Range in Decibels: +0.0 TO 22.1. 18 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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