PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

L4Attenuator,variable

Yosemite Investment Inc Dba North American Capacitor Co · NSN 5985-00-201-3680 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-201-3680 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-201-3680. Primary manufacturer part number: L4.
Features
  • Attenuator,variable — FSC 5985
  • Body Length: 1.125 INCHES NOMINAL IN
  • Frequency Range: 0.000 KILOHERTZ MINIMUM AND 20.000 KILOHERTZ MAXIMUM
  • Application Design: AUDIO
  • Shaft Length: 2.000 INCHES NOMINAL IN
  • Mounting Facility Screw Thread Series Designator: UNEF
  • Mounting Facility Type and Quantity: 1 THREADED BUSHING
  • Shaft Type: ROUND
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,variable, cataloged under National Stock Number 5985-00-201-3680, 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 Yosemite Investment Inc Dba North American Capacitor Co. Government technical data includes 20 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: Cancelled.

Technical Specifications
ParameterValue
NSN5985-00-201-3680
Primary Part NumberL4
Item NameAttenuator,variable
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerYosemite Investment Inc Dba North American Capacitor Co
StatusCANCELLED
Body Length1.125 INCHES NOMINAL IN
Frequency Range0.000 KILOHERTZ MINIMUM AND 20.000 KILOHERTZ MAXIMUM
Application DesignAUDIO
Shaft Length2.000 INCHES NOMINAL IN
Mounting Facility Screw Thread Series DesignatorUNEF
Mounting Facility Type and Quantity1 THREADED BUSHING
Shaft TypeROUND
Mounting Thread Quantity32 PER INCH
Overall Attenuation Range in Decibels+0.0 TO 20.0
Bushing Length0.375 INCHES NOMINAL IN
Body StyleCYLINDRICAL W/SIDE TERMINALS
Power Rating4.0 WATTS AVERAGE
Schematic Diagram DesignatorUNBALANCED "LR"
Attenuation Variation MethodCONTINUOUS
Body Diameter1.625 INCHES NOMINAL IN
Shaft Diameter0.250 INCHES NOMINAL IN
Mounting Facility Nominal Screw Thread Diameter0.375 INCHES IN
Overall Attenuation Accuracy in Decibels-1.50 TO 1.50
Adjustment Device Type and Quantity2 SHAFT
Terminal Type and Quantity4 TAB, SOLDER LUG
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-155-9145 INTERCHANGEABLE
Bearing,ball,thrust
5120-00-189-29925120-00-189-2992 INTERCHANGEABLE
Key,socket Head Screw
General Services Administration Federal Supply Service
3110-00-227-2597A4812 INTERCHANGEABLE
Bearing,ball,linear Motion
Thomson Industries Inc
4820-00-460-2412 INTERCHANGEABLE
Valve,globe
5120-00-618-8981L4 INTERCHANGEABLE
Tacker
Markwell Mfg Co Inc
5330-00-641-20690S528 INTERCHANGEABLE
Seal,plain Encased
Hoist Liftruck Mfg Inc
5340-00-821-85581004A INTERCHANGEABLE
Key Blank
Ilco Unican Corp Dba Wolf Sales
2940-00-892-6214104397A INTERCHANGEABLE
Filter Element,fluid
Agco Corp Parts Opn
5330-01-231-4011L4 INTERCHANGEABLE
Gasket
Military & Commercial Fasteners Corp
3020-01-265-2641461-1 INTERCHANGEABLE
Gear Cluster
Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division
Cross-Reference Index
Part NumberManufacturer
L4 Mallory Controls Co Sub of Emhart Industries Inc (USA)
L4 PRIMARY Yosemite Investment Inc Dba North American Capacitor Co (USA)
Related Parts
3110-00-155-9145INTERCHANGEABLE
BEARING,BALL,THRUST
5120-00-189-2992INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
5120-00-189-2992
3110-00-227-2597INTERCHANGEABLE
BEARING,BALL,LINEAR MOTION
A4812
4820-00-460-2412INTERCHANGEABLE
VALVE,GLOBE
5120-00-618-8981INTERCHANGEABLE
TACKER
L4
5330-00-641-2069INTERCHANGEABLE
SEAL,PLAIN ENCASED
0S528
5340-00-821-8558INTERCHANGEABLE
KEY BLANK
1004A
2940-00-892-6214INTERCHANGEABLE
FILTER ELEMENT,FLUID
104397A
5330-01-231-4011INTERCHANGEABLE
GASKET
L4
3020-01-265-2641INTERCHANGEABLE
GEAR CLUSTER
461-1
6520-01-448-9375INTERCHANGEABLE
WHEEL,POLISHING,SOFT
L4
7690-01-492-6240INTERCHANGEABLE
MARKER,IDENTIFICATION
L4

Frequently Asked Questions

What is NSN 5985-00-201-3680?

NSN 5985-00-201-3680 is a Attenuator,variable, manufactured by Yosemite Investment Inc Dba North American Capacitor Co, classified under FSC 5985 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5985-00-201-3680?

NSN 5985-00-201-3680 has 2 cross-referenced part numbers: L4 (Mallory Controls Co Sub of Emhart Industries Inc), L4 (Yosemite Investment Inc Dba North American Capacitor Co).

What NSN replaces 5985-00-201-3680?

There are 12 known substitutes for 5985-00-201-3680: 3110-00-155-9145, 5120-00-189-2992, 3110-00-227-2597 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of L4?

Key specifications for L4: Body Length: 1.125 INCHES NOMINAL IN; Frequency Range: 0.000 KILOHERTZ MINIMUM AND 20.000 KILOHERTZ MAXIMUM; Application Design: AUDIO; Shaft Length: 2.000 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5985-00-201-3680 still in active supply?

NSN 5985-00-201-3680 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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