PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3688Attenuator,variable

Meggitt (new Hampshire), Inc · NSN 5985-00-296-7656 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-296-7656 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-296-7656. Primary manufacturer part number: 3688.
Features
  • Attenuator,variable — FSC 5985
  • Body Diameter: 2.750 INCHES NOMINAL IN
  • Power Rating: 600.0 MILLIWATTS AVERAGE
  • Step Position Quantity: 8
  • Overall Attenuation Accuracy in Decibels: -0.40 TO 0.40
  • Body Length: 2.625 INCHES NOMINAL IN
  • Attenuation Variation Method: STEPPED
  • Frequency Range: 0.000 KILOHERTZ MINIMUM AND 15.000 KILOHERTZ MAXIMUM
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,variable, cataloged under National Stock Number 5985-00-296-7656, 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 Meggitt (new Hampshire), Inc. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5985-00-296-7656
Primary Part Number3688
Item NameAttenuator,variable
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerMeggitt (new Hampshire), Inc
StatusACTIVE
Body Diameter2.750 INCHES NOMINAL IN
Power Rating600.0 MILLIWATTS AVERAGE
Step Position Quantity8
Overall Attenuation Accuracy in Decibels-0.40 TO 0.40
Body Length2.625 INCHES NOMINAL IN
Attenuation Variation MethodSTEPPED
Frequency Range0.000 KILOHERTZ MINIMUM AND 15.000 KILOHERTZ MAXIMUM
Terminal Type and Quantity6 TAB, SOLDER LUG
Shaft Diameter0.250 INCHES NOMINAL IN
Bushing Length0.375 INCHES NOMINAL IN
Shaft TypeROUND
Attenuation Per Step in Decibels10.0
Mounting Facility Nominal Screw Thread Diameter0.375 INCHES IN
Application DesignAUDIO
Mounting Facility Type and Quantity1 THREADED BUSHING
Overall Attenuation Range in Decibels+0.0 TO 80.0
Mounting Facility Screw Thread Series DesignatorUNEF
Schematic Diagram DesignatorUNBALANCED LADDER
Adjustment Device Type and Quantity2 SHAFT
Shaft Length0.750 INCHES NOMINAL IN
Body StyleCYLINDRICAL W/SIDE TERMINALS
Mounting Thread Quantity32 PER INCH
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5961-00-935-0138 INTERCHANGEABLE
Semiconductor Device,diode
5120-01-080-65375120-01-080-6537 INTERCHANGEABLE
Punch,aligning
General Services Administration Federal Supply Service
4130-01-126-4816903688 INTERCHANGEABLE
Filter Element,air Conditioning
Airsan Corporation Dba Airsan Corp
5330-01-224-85903688 INTERCHANGEABLE
Seal,oil Compressor
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
4920-01-287-71593688 INTERCHANGEABLE
Calibrator
King Nutronics Corporation Dba King Nutronics
3130-01-314-53623688 INTERCHANGEABLE
Housing,bearing Unit
Triangle Manufacturing Co
5305-01-532-51083688 INTERCHANGEABLE
Screw,cap,socket Head
80/20, Llc
4730-01-680-6756HC-250 INTERCHANGEABLE
Clamp,hose
J.w.f. Technologies, Llc
5995-01-725-08763688 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Adafruit Industries Llc
Cross-Reference Index
Part NumberManufacturer
3688 Meggitt (new Hampshire), Inc (USA)
Related Parts
5961-00-935-0138INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5120-01-080-6537INTERCHANGEABLE
PUNCH,ALIGNING
5120-01-080-6537
4130-01-126-4816INTERCHANGEABLE
FILTER ELEMENT,AIR CONDITIONING
903688
5330-01-224-8590INTERCHANGEABLE
SEAL,OIL COMPRESSOR
3688
4920-01-287-7159INTERCHANGEABLE
CALIBRATOR
3688
3130-01-314-5362INTERCHANGEABLE
HOUSING,BEARING UNIT
3688
5305-01-532-5108INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
3688
4730-01-680-6756INTERCHANGEABLE
CLAMP,HOSE
HC-250
5995-01-725-0876INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
3688

Frequently Asked Questions

What is NSN 5985-00-296-7656?

NSN 5985-00-296-7656 is a Attenuator,variable, manufactured by Meggitt (new Hampshire), Inc, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-296-7656?

NSN 5985-00-296-7656 has 1 cross-referenced part number: 3688 (Meggitt (new Hampshire), Inc).

What NSN replaces 5985-00-296-7656?

There are 9 known substitutes for 5985-00-296-7656: 5961-00-935-0138, 5120-01-080-6537, 4130-01-126-4816 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3688?

Key specifications for 3688: Body Diameter: 2.750 INCHES NOMINAL IN; Power Rating: 600.0 MILLIWATTS AVERAGE; Step Position Quantity: 8; Overall Attenuation Accuracy in Decibels: -0.40 TO 0.40. 24 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com