PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-F-21346/3Fuseholder,block

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5920-00-841-9928 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-00-841-9928 — this item is cataloged by the U.S. Government under National Stock Number 5920-00-841-9928. Primary manufacturer part number: MIL-F-21346/3.
Features
  • Fuseholder,block — FSC 5920
  • Accommodated Ferrule Diameter: 0.250 INCHES NOMINAL IN
  • Mounting Hole Diameter: 0.138 INCHES NOMINAL IN
  • Material Document and Classification: QQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE CONTACT
  • Material Document and Classification: QQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE TERMINAL
  • Test Data Document: 81349-MIL-F-21346 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.).
  • Fuse Terminal Type Accommodated: FERRULE
  • Internal Circuit Configuration and Pole Quantity: 1 POLE, MAINLINE, FUSED
Applications
  • Applications requiring Copper Alloy 172 or Copper Alloy 173 or Copper Alloy 170 or Copper Alloy 172 Terminal construction
General Description

The Fuseholder,block, cataloged under National Stock Number 5920-00-841-9928, is classified within Federal Supply Class 5920 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5920-00-841-9928
Primary Part NumberMIL-F-21346/3
Item NameFuseholder,block
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Accommodated Ferrule Diameter0.250 INCHES NOMINAL IN
Mounting Hole Diameter0.138 INCHES NOMINAL IN
Material Document and ClassificationQQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE CONTACT
Material Document and ClassificationQQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE TERMINAL
Test Data Document81349-MIL-F-21346 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.).
Fuse Terminal Type AccommodatedFERRULE
Internal Circuit Configuration and Pole Quantity1 POLE, MAINLINE, FUSED
Voltage in Volts250.0
Surface TreatmentSOLDER DIP AND TIN TERMINAL
MaterialCOPPER ALLOY 172 OR COPPER ALLOY 173 OR COPPER ALLOY 170 OR COPPER ALLOY 172 TERMINAL
Coating MethodPLATED CONTACT
Terminal Type and Quantity2 TAB, SOLDER LUG
Surface TreatmentCOPPER AND TIN AND ZINC CONTACT
MaterialPLASTIC DIALLYL PHTHALATE AND SILICA AND PLASTIC POLYHEXAMETHYLENE ADIPAMIDE AND GLASS OR PLASTIC POLYCAPROLACTAM AND GLASS OR PLASTIC POLYHEXAMETHYLENE SEBACAMIDE AND GLASS AND PLASTIC MELAMINE AND SILICA AND PLASTIC SILICONE AND GLASS FIBER BODY
MaterialCOPPER ALLOY 172 OR COPPER ALLOY 173 OR COPPER ALLOY 170 OR COPPER ALLOY 172 CONTACT
Material Document and ClassificationMIL-M-14, TYPE MDG MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-M-14, TYPE SDG MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-M-14, TYPE MME MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-M-14, TYPE MSG MIL SPEC SINGLE MATERIAL RESPONSE BODY
Accommodated Fuse Length1.250 INCHES NOMINAL IN
Fuse Accommodation Quantity1
Mounting Hole Quantity1
Base Thickness0.230 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
Mounting Hole StyleONE HOLE MOUNTING
Body StyleCLIP CONNECTED TYPE
Current Carrying Rating in Amps2.0
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5935-00-619-3687 INTERCHANGEABLE
Connector,receptacle,electrical
5330-00-915-455835511-51 INTERCHANGEABLE
Gasket
Leslie Controls, Inc. Dba Leslie Controls Inc
6210-01-125-26253551-1 INTERCHANGEABLE
Light Assembly,indicator
Safran Electronics & Defense, Avionics Usa, Llc
5330-01-278-9562355-11A INTERCHANGEABLE
Retainer,packing
Magnatrol Valve Corp Div Clark-Cooper
6680-01-663-710335511 INTERCHANGEABLE
Speed Sensor,turbine Engine
Lockheed Martin Aeronautical Systems Support Company Dba Lmassc
Cross-Reference Index
Part NumberManufacturer
MIL-F-21346/3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M21346/3-02 Lockheed Martin Corporation Div Rms (USA)
M21346/3-02 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
3551-1 Cooper Bussmann, Llc Dba Cooper Industries (USA)
FH21AM Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5935-00-619-3687INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5330-00-915-4558INTERCHANGEABLE
GASKET
35511-51
6210-01-125-2625INTERCHANGEABLE
LIGHT ASSEMBLY,INDICATOR
3551-1
5330-01-278-9562INTERCHANGEABLE
RETAINER,PACKING
355-11A
6680-01-663-7103INTERCHANGEABLE
SPEED SENSOR,TURBINE ENGINE
35511

Frequently Asked Questions

What is NSN 5920-00-841-9928?

NSN 5920-00-841-9928 is a Fuseholder,block, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5920 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5920-00-841-9928?

NSN 5920-00-841-9928 has 5 cross-referenced part numbers: MIL-F-21346/3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M21346/3-02 (Lockheed Martin Corporation Div Rms), M21346/3-02 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 3551-1 (Cooper Bussmann, Llc Dba Cooper Industries), FH21AM (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5920-00-841-9928?

There are 5 known substitutes for 5920-00-841-9928: 5935-00-619-3687, 5330-00-915-4558, 6210-01-125-2625 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-F-21346/3?

Key specifications for MIL-F-21346/3: Accommodated Ferrule Diameter: 0.250 INCHES NOMINAL IN; Mounting Hole Diameter: 0.138 INCHES NOMINAL IN; Material Document and Classification: QQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE CONTACT; Material Document and Classification: QQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE TERMINAL. 26 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5920-00-841-9928 still in active supply?

NSN 5920-00-841-9928 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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