PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A8521Resistor,fixed,composition

Aeronautical Communications Equipment Inc · NSN 5905-00-135-3975 · FSC 5905 · No Item Name Available
Verified by PartsTable
NSN 5905-00-135-3975 — this item is cataloged by the U.S. Government under National Stock Number 5905-00-135-3975. Primary manufacturer part number: A8521.
Features
  • Resistor,fixed,composition — FSC 5905
  • Test Data Document: 81349-MIL-R-39008 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Power Dissipation Rating in Watts: 0.250 FREE AIR
  • Ambient Temp at Full Rated Power: 70.0 CELSIUS DEGC
  • Body Diameter: 0.090 INCHES NOMINAL IN
  • Inclosure Type: ENCAPSULATED
  • Body Length: 0.250 INCHES NOMINAL IN
  • Reliability Indicator: NOT ESTABLISHED
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
General Description

The Resistor,fixed,composition, cataloged under National Stock Number 5905-00-135-3975, is classified within Federal Supply Class 5905 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Aeronautical Communications Equipment Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 31 commercial cross-references from 23 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
NSN5905-00-135-3975
Primary Part NumberA8521
Item NameResistor,fixed,composition
FSC / FSG5905 / 59 — No Item Name Available
ManufacturerAeronautical Communications Equipment Inc
StatusCANCELLED
Test Data Document81349-MIL-R-39008 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Power Dissipation Rating in Watts0.250 FREE AIR
Ambient Temp at Full Rated Power70.0 CELSIUS DEGC
Body Diameter0.090 INCHES NOMINAL IN
Inclosure TypeENCAPSULATED
Body Length0.250 INCHES NOMINAL IN
Reliability IndicatorNOT ESTABLISHED
Ambient Temp in Deg Celsius at Zero Percent Rated Power130.0
Terminal TypeWIRE LEAD
Terminal Length1.500 INCHES NOMINAL IN
Resistance Tolerance in Percent-5.000 TO 5.000
Style DesignatorAXIAL TERMINAL EACH END
Electrical Resistance68.000 OHMS
Specification/standard Data81349-MIL-R-39008/1 GOVERNMENT SPECIFICATION
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5905-00-141-1878 INTERCHANGEABLE
Resistor,fixed,composition
3010-00-240-668258A48562 INTERCHANGEABLE
Coupling,shaft,flexible
General Dynamics Mission Systems, Inc. Dba Gdms
3040-00-419-9122216442 INTERCHANGEABLE
Shaft,straight
Dana Off Highway Products, Llc
4440-00-580-7293MA-1FG INTERCHANGEABLE
Cartridge,dehydrator
Aqw Inc
5950-00-752-4668 INTERCHANGEABLE
Coil,radio Frequency
5905-00-763-4058 INTERCHANGEABLE
Resistor,fixed,composition
5905-01-040-2660 INTERCHANGEABLE
Resistor,fixed,composition
3040-01-124-38101011628 INTERCHANGEABLE
Lever,manual Control
Norriseal Norris Values Div Dba Dover Co
5905-01-138-6236 INTERCHANGEABLE
Resistor,fixed,film
3010-01-466-3998 INTERCHANGEABLE
Clutch Assembly,friction
Cross-Reference Index
Part NumberManufacturer
A8521 Aeronautical Communications Equipment Inc (USA)
400-512-035 Elettronica Gmbh (DEU)
137-007-6805 Northrop Grumman Systems Corporation (USA)
X4-123B37 Horizon Aerospace Llc Dba Magnetics Division (USA)
10047-690-680 Cooper Crouse-Hinds Llc (USA)
410009 Syqwest Llc (USA)
311-007-680 L3harris Interstate Electronics Corporation (USA)
745-0706-000 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
6S124A21 Motorola Inc. Dba Integrated Information Systems Group (USA)
RCR07G680JM Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
216442 International Business Machines Corporation Dba IBM (USA)
400-6801 Johnson E F Co Comco/communications Co Div (USA)
RC07GF68R0J Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-R-39008/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6S129861 Motorola Inc. Dba Integrated Information Systems Group (USA)
RCR07G680JR Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
5905PL1363988 Jednolity Indeks Materialowy - Uniform Material Index (POL)
RCR07G680KS Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
RCR07G680JS Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
060-06802-041 Lh Enterprise (USA)
Related Parts
5905-00-141-1878INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
3010-00-240-6682INTERCHANGEABLE
COUPLING,SHAFT,FLEXIBLE
58A48562
3040-00-419-9122INTERCHANGEABLE
SHAFT,STRAIGHT
216442
4440-00-580-7293INTERCHANGEABLE
CARTRIDGE,DEHYDRATOR
MA-1FG
5950-00-752-4668INTERCHANGEABLE
COIL,RADIO FREQUENCY
5905-00-763-4058INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
5905-01-040-2660INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
3040-01-124-3810INTERCHANGEABLE
LEVER,MANUAL CONTROL
1011628
5905-01-138-6236INTERCHANGEABLE
RESISTOR,FIXED,FILM
3010-01-466-3998INTERCHANGEABLE
CLUTCH ASSEMBLY,FRICTION
5315-01-483-7374INTERCHANGEABLE
KEY,WOODRUFF
SA14401139
3220-01-563-5403INTERCHANGEABLE
SAW,CIRCULAR,TABLE TYPE
4100-09

Frequently Asked Questions

What is NSN 5905-00-135-3975?

NSN 5905-00-135-3975 is a Resistor,fixed,composition, manufactured by Aeronautical Communications Equipment Inc, classified under FSC 5905 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5905-00-135-3975?

NSN 5905-00-135-3975 has 31 cross-referenced part numbers: A8521 (Aeronautical Communications Equipment Inc), 400-512-035 (Elettronica Gmbh), 137-007-6805 (Northrop Grumman Systems Corporation), X4-123B37 (Horizon Aerospace Llc Dba Magnetics Division), 10047-690-680 (Cooper Crouse-Hinds Llc) and 26 more.

What NSN replaces 5905-00-135-3975?

There are 12 known substitutes for 5905-00-135-3975: 5905-00-141-1878, 3010-00-240-6682, 3040-00-419-9122 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A8521?

Key specifications for A8521: Test Data Document: 81349-MIL-R-39008 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Power Dissipation Rating in Watts: 0.250 FREE AIR; Ambient Temp at Full Rated Power: 70.0 CELSIUS DEGC; Body Diameter: 0.090 INCHES NOMINAL IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5905-00-135-3975 still in active supply?

NSN 5905-00-135-3975 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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