PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3291A-563Attenuator,variable

General Microwave Corporation Div Kratos Microwave Electronics · NSN 5985-01-122-4871 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-122-4871 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-122-4871. Primary manufacturer part number: 3291A-563.
Features
  • Attenuator,variable — FSC 5985
  • Voltage Standing Wave Ratio: 2.00
  • Attenuation Variation Method: CONTINUOUS
  • Insertion Loss at Minimum Attenuation in Maximum Decibels: 1.8
  • Overall Attenuation Range in Decibels: +0.0 TO 80.0
  • Body Style: COAXIAL TYPE
  • Unthreaded Mounting Hole Diameter: 0.171 INCHES NOMINAL IN
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 2.120 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,variable, cataloged under National Stock Number 5985-01-122-4871, 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 General Microwave Corporation Div Kratos Microwave Electronics. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-122-4871
Primary Part Number3291A-563
Item NameAttenuator,variable
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerGeneral Microwave Corporation Div Kratos Microwave Electronics
StatusACTIVE
Voltage Standing Wave Ratio2.00
Attenuation Variation MethodCONTINUOUS
Insertion Loss at Minimum Attenuation in Maximum Decibels1.8
Overall Attenuation Range in Decibels+0.0 TO 80.0
Body StyleCOAXIAL TYPE
Unthreaded Mounting Hole Diameter0.171 INCHES NOMINAL IN
Center to Center Distance Between Mounting Facilities Parallel to Width2.120 INCHES NOMINAL IN
Frequency Range800.000 MEGAHERTZ MINIMUM AND 2.400 GIGAHERTZ MAXIMUM
Mounting Facility PatternFOUR POSITION RECTANGULAR
Coaxial Connector Series DesignationSMA
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S)
Overall Attenuation Accuracy in Decibels-0.35 TO 0.35
Terminal Type and Quantity2 CONNECTOR, COAXIAL, FEMALE
Center to Center Distance Between Mounting Facilities Parallel to Height3.530 INCHES NOMINAL IN
Power Rating100.0 MILLIWATTS AVERAGE
Adjustment Device Type and Quantity1 SLOTTED SCREW
Application DesignTRANSMISSION LINE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5950-00-064-40131583908-1 INTERCHANGEABLE
Reactor
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
3110-00-156-7906 INTERCHANGEABLE
Bearing,ball,annular
5305-00-206-1065 INTERCHANGEABLE
Screw,cap,hexagon Head
5935-00-259-3326100010 INTERCHANGEABLE
Connector,receptacle,electrical
Allianz Sweeper Company
6625-00-630-16845609 INTERCHANGEABLE
Bolometer Element,low Power
Solitron Devices, Inc.
5935-00-655-4424276-1854PC1 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Co Equipment Development Lab
5961-01-113-4165 INTERCHANGEABLE
Semiconductor Device,thyristor
5330-01-238-93335609 INTERCHANGEABLE
Seal,plain
Eaton Corporation Div Fed
Cross-Reference Index
Part NumberManufacturer
3291-80 General Microwave Corporation Div Kratos Microwave Electronics (USA)
3291-80-0.1 General Microwave Corporation Div Kratos Microwave Electronics (USA)
C10073-1 Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
3291-563 General Microwave Corporation Div Kratos Microwave Electronics (USA)
D1790518 Marc Alan Group the, Inc (USA)
5609 Spectrum Control Inc Div Weinschel (USA)
3291A-563 PRIMARY General Microwave Corporation Div Kratos Microwave Electronics (USA)
MA-12DS Kn-an Inc Dba Agway (USA)
Related Parts
5950-00-064-4013INTERCHANGEABLE
REACTOR
1583908-1
3110-00-156-7906INTERCHANGEABLE
BEARING,BALL,ANNULAR
5305-00-206-1065INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5935-00-259-3326INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
100010
6625-00-630-1684INTERCHANGEABLE
BOLOMETER ELEMENT,LOW POWER
5609
5935-00-655-4424INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
276-1854PC1
5961-01-113-4165INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5330-01-238-9333INTERCHANGEABLE
SEAL,PLAIN
5609

Frequently Asked Questions

What is NSN 5985-01-122-4871?

NSN 5985-01-122-4871 is a Attenuator,variable, manufactured by General Microwave Corporation Div Kratos Microwave Electronics, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-122-4871?

NSN 5985-01-122-4871 has 8 cross-referenced part numbers: 3291-80 (General Microwave Corporation Div Kratos Microwave Electronics), 3291-80-0.1 (General Microwave Corporation Div Kratos Microwave Electronics), C10073-1 (Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company), 3291-563 (General Microwave Corporation Div Kratos Microwave Electronics), D1790518 (Marc Alan Group the, Inc) and 3 more.

What NSN replaces 5985-01-122-4871?

There are 8 known substitutes for 5985-01-122-4871: 5950-00-064-4013, 3110-00-156-7906, 5305-00-206-1065 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3291A-563?

Key specifications for 3291A-563: Voltage Standing Wave Ratio: 2.00; Attenuation Variation Method: CONTINUOUS; Insertion Loss at Minimum Attenuation in Maximum Decibels: 1.8; Overall Attenuation Range in Decibels: +0.0 TO 80.0. 21 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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