PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9312-3Attenuator,fixed

Spectrum Microwave, Inc. · NSN 5985-00-998-5589 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-998-5589 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-998-5589. Primary manufacturer part number: 9312-3.
Features
  • Attenuator,fixed — FSC 5985
  • Input Impedance Rating in Ohms: 50.050.0
  • Mounting Method: CONNECTORCONNECTOR
  • Rf Signal Attenuation in Decibels: 3.03.0
  • Terminal Type and Quantity: 2 CONNECTOR2 CONNECTOR
  • Frequency Range: 0.000 HERTZ MINIMUM AND 0.000 HERTZ MINIMUM AND 5.000 GIGAHERTZ MAXIMUM5.000 GIGAHERTZ MAXIMUM
  • Attenuation Accuracy in Decibels: -0.50 TO 0.50-0.50 TO 0.50
  • Operating Temp Range: -15.0 TO 38.0 CELSIUS-15.0 TO 38.0 CELSIUS DEGC
Applications
  • Applications requiring Copper Alloy Body construction
General Description

The Attenuator,fixed, cataloged under National Stock Number 5985-00-998-5589, 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 Spectrum Microwave, Inc.. 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-998-5589
Primary Part Number9312-3
Item NameAttenuator,fixed
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerSpectrum Microwave, Inc.
StatusACTIVE
Input Impedance Rating in Ohms50.050.0
Mounting MethodCONNECTORCONNECTOR
Rf Signal Attenuation in Decibels3.03.0
Terminal Type and Quantity2 CONNECTOR2 CONNECTOR
Frequency Range0.000 HERTZ MINIMUM AND 0.000 HERTZ MINIMUM AND 5.000 GIGAHERTZ MAXIMUM5.000 GIGAHERTZ MAXIMUM
Attenuation Accuracy in Decibels-0.50 TO 0.50-0.50 TO 0.50
Operating Temp Range-15.0 TO 38.0 CELSIUS-15.0 TO 38.0 CELSIUS DEGC
MaterialCOPPER ALLOY BODY
Output Impedance Rating in Ohms50.050.0
Body StyleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACEROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
Overall Diameter0.625 INCHES MAXIMUM0.625 INCHES MAXIMUM IN
Coaxial Connector Series DesignationTNCTNC
Connection Type Per FunctionFEMALE INPUT AND FEMALE INPUT AND MALE OUTPUTMALE OUTPUT
Power Rating2.0 WATTS AVERAGE AND 2.0 WATTS AVERAGE AND 1.0 KILOWATTS PEAK1.0 KILOWATTS PEAK
Application DesignTRANSMISSION LINETRANSMISSION LINE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5940-00-113-9828AS25036-148 INTERCHANGEABLE
Terminal,lug
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-274-454111A2287 INTERCHANGEABLE
Washer,flat
Napco International Llc Dba Napco International Inc
5330-00-853-41539947LPDH1L5 INTERCHANGEABLE
Seal,plain
Johns Manville Intl
5330-01-439-1939 INTERCHANGEABLE
Seal,plain
Cross-Reference Index
Part NumberManufacturer
9312-3 Spectrum Microwave, Inc. (USA)
11253149-3 Ballistic Missile Defense Systems Command (USA)
Related Parts
5940-00-113-9828INTERCHANGEABLE
TERMINAL,LUG
AS25036-148
5310-00-274-4541INTERCHANGEABLE
WASHER,FLAT
11A2287
5330-00-853-4153INTERCHANGEABLE
SEAL,PLAIN
9947LPDH1L5
5330-01-439-1939INTERCHANGEABLE
SEAL,PLAIN

Frequently Asked Questions

What is NSN 5985-00-998-5589?

NSN 5985-00-998-5589 is a Attenuator,fixed, manufactured by Spectrum Microwave, Inc., classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-998-5589?

NSN 5985-00-998-5589 has 2 cross-referenced part numbers: 9312-3 (Spectrum Microwave, Inc.), 11253149-3 (Ballistic Missile Defense Systems Command).

What NSN replaces 5985-00-998-5589?

There are 4 known substitutes for 5985-00-998-5589: 5940-00-113-9828, 5310-00-274-4541, 5330-00-853-4153 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9312-3?

Key specifications for 9312-3: Input Impedance Rating in Ohms: 50.050.0; Mounting Method: CONNECTORCONNECTOR; Rf Signal Attenuation in Decibels: 3.03.0; Terminal Type and Quantity: 2 CONNECTOR2 CONNECTOR. 16 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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