PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6521-1Attenuator,fixed

Spectrum Control Inc Div Weinschel · NSN 5985-01-538-6244 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-538-6244 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-538-6244. Primary manufacturer part number: 6521-1.
Features
  • Attenuator,fixed — FSC 5985
  • Connection Type Per Function: FEMALE OUTPUT AND MALE INPUT
  • Operating Temp Range: -55.0 TO 125.0 CELSIUS DEGC
  • Voltage Standing Wave Ratio Frequency Range: +0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 18.0 GIGAHERTZ
  • Rf Signal Attenuation in Decibels: 1.0
  • Input Impedance Rating in Ohms: 50.0
  • Body Style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
  • Terminal Type and Quantity: 2 CONNECTOR
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,fixed, cataloged under National Stock Number 5985-01-538-6244, 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 Control Inc Div Weinschel. 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-538-6244
Primary Part Number6521-1
Item NameAttenuator,fixed
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerSpectrum Control Inc Div Weinschel
StatusACTIVE
Connection Type Per FunctionFEMALE OUTPUT AND MALE INPUT
Operating Temp Range-55.0 TO 125.0 CELSIUS DEGC
Voltage Standing Wave Ratio Frequency Range+0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 18.0 GIGAHERTZ
Rf Signal Attenuation in Decibels1.0
Input Impedance Rating in Ohms50.0
Body StyleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
Terminal Type and Quantity2 CONNECTOR
Power Rating25.0 WATTS AVERAGE
Mounting MethodCONNECTOR
Coaxial Connector Series DesignationN
Frequency Range0.000 HERTZ MINIMUM AND 18.000 GIGAHERTZ MAXIMUM
Voltage Standing Wave Ratio1.20 AND 1.30
Overall Diameter1.650 INCHES MAXIMUM IN
Output Impedance Rating in Ohms50.0
Application DesignTRANSMISSION LINE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3020-00-225-8634652-11 INTERCHANGEABLE
Gear,spur
Teledyne Brown Engineering, Inc. Dba Teledyne Advanced Electronic Solutions Div Teledyne Advanced Electronic Solutions
4310-00-390-566065-211 INTERCHANGEABLE
Seal Assembly,shaft
Johnson Controls Navy Systems, Llc
4730-01-117-658863PT-5-40 INTERCHANGEABLE
Insert,tube Fitting
Parker-Hannifin Corp Div Fluid System Connector Division
5330-01-277-99206521100 INTERCHANGEABLE
Gasket
Alfa Laval Inc
4730-01-315-817865211 INTERCHANGEABLE
Coupling Half,self-Sealing
Eaton Corporation Dba Eaton Inoac
5985-01-524-57726521 INTERCHANGEABLE
Antenna Subassembly
Spectrum Control Inc Div Weinschel
5985-01-538-62536521-2 INTERCHANGEABLE
Attenuator,fixed
Spectrum Control Inc Div Weinschel
5985-01-538-62616521-3 INTERCHANGEABLE
Attenuator,fixed
Spectrum Control Inc Div Weinschel
4320-01-671-115165211 INTERCHANGEABLE
Plunger,hydraulic Ram
Malabar
Cross-Reference Index
Part NumberManufacturer
6521-1 PRIMARY Spectrum Control Inc Div Weinschel (USA)
7607083 Naval Sea Systems Command (USA)
Related Parts
3020-00-225-8634INTERCHANGEABLE
GEAR,SPUR
652-11
4310-00-390-5660INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT
65-211
4730-01-117-6588INTERCHANGEABLE
INSERT,TUBE FITTING
63PT-5-40
5330-01-277-9920INTERCHANGEABLE
GASKET
6521100
4730-01-315-8178INTERCHANGEABLE
COUPLING HALF,SELF-SEALING
65211
5985-01-524-5772INTERCHANGEABLE
ANTENNA SUBASSEMBLY
6521
5985-01-538-6253INTERCHANGEABLE
ATTENUATOR,FIXED
6521-2
5985-01-538-6261INTERCHANGEABLE
ATTENUATOR,FIXED
6521-3
4320-01-671-1151INTERCHANGEABLE
PLUNGER,HYDRAULIC RAM
65211

Frequently Asked Questions

What is NSN 5985-01-538-6244?

NSN 5985-01-538-6244 is a Attenuator,fixed, manufactured by Spectrum Control Inc Div Weinschel, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-538-6244?

NSN 5985-01-538-6244 has 2 cross-referenced part numbers: 6521-1 (Spectrum Control Inc Div Weinschel), 7607083 (Naval Sea Systems Command).

What NSN replaces 5985-01-538-6244?

There are 9 known substitutes for 5985-01-538-6244: 3020-00-225-8634, 4310-00-390-5660, 4730-01-117-6588 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6521-1?

Key specifications for 6521-1: Connection Type Per Function: FEMALE OUTPUT AND MALE INPUT; Operating Temp Range: -55.0 TO 125.0 CELSIUS DEGC; Voltage Standing Wave Ratio Frequency Range: +0.0 TO 4.0 GIGAHERTZ AND +4.0 TO 18.0 GIGAHERTZ; Rf Signal Attenuation in Decibels: 1.0. 17 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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