PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

491-3479-3Lead,test

Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions · NSN 6625-00-865-6643 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-865-6643 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-865-6643. Primary manufacturer part number: 491-3479-3.
Features
  • Lead,test — FSC 6625
  • Strand Awg Size Per Conductor: 32 ALL CONDUCTORS
  • Cross Section Outside Diameter: 0.087 INCHES NOMINAL IN
  • Strand Quantity Per Conductor: 19 ALL CONDUCTORS
  • Material: PLASTIC POLYVINYL FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
  • Termination Type: PLUG TELEPHONE BOTH ENDS SINGLE CONDUCTOR
  • Material: COPPER CORE CONDUCTOR ALL CONDUCTORS
  • Color: RED FIRST POSITION COVER SINGLE CONDUCTOR
Applications
  • Applications requiring Plastic Polyvinyl First Position Primary Insulation Single Conductor construction
General Description

The Lead,test, cataloged under National Stock Number 6625-00-865-6643, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-865-6643
Primary Part Number491-3479-3
Item NameLead,test
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions
StatusACTIVE
Strand Awg Size Per Conductor32 ALL CONDUCTORS
Cross Section Outside Diameter0.087 INCHES NOMINAL IN
Strand Quantity Per Conductor19 ALL CONDUCTORS
MaterialPLASTIC POLYVINYL FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
Termination TypePLUG TELEPHONE BOTH ENDS SINGLE CONDUCTOR
MaterialCOPPER CORE CONDUCTOR ALL CONDUCTORS
ColorRED FIRST POSITION COVER SINGLE CONDUCTOR
Criticality Code JustificationFEAT
Conductor FormSTRANDED SINGLE CONDUCTOR
Round Conductor Size20 AWG SINGLE CONDUCTOR
Cross-Sectional Shape StyleROUND
Strand Awg Size Per Conductor32 ALL CONDUCTORS
Cross Section Outside Diameter0.087 INCHES NOMINAL IN
Strand Quantity Per Conductor19 ALL CONDUCTORS
MaterialPLASTIC POLYVINYL FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR
Termination TypePLUG TELEPHONE BOTH ENDS SINGLE CONDUCTOR
MaterialCOPPER CORE CONDUCTOR ALL CONDUCTORS
ColorRED FIRST POSITION COVER SINGLE CONDUCTOR
Criticality Code JustificationFEAT
Conductor FormSTRANDED SINGLE CONDUCTOR
Round Conductor Size20 AWG SINGLE CONDUCTOR
Cross-Sectional Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeZN
Weight0.0100 lbs
Cube0.0058 cu ft
Verified Substitutes 8
4320-00-122-0623P4-2 INTERCHANGEABLE
Piston,pump
Star Hydraulics Llc
5340-00-200-8637P42 INTERCHANGEABLE
Plug,protective,dust and Moistur
Meritor Industrial Products, Llc
5306-00-208-3075P42 INTERCHANGEABLE
Bolt,internal Wrenching
Eaton Aerospace, Llc Dba Jackson South
5935-01-021-1042NG0-092120-0004 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Nec America Inc
4730-01-521-8312P42 INTERCHANGEABLE
Plug,pipe
Meritor Heavy Vehicle Systems, Llc
2910-01-524-2734P-42 INTERCHANGEABLE
Pump,hand,fuel Pump
Simplex Manufacturing Co. Dba Dart Aerospace
6525-01-583-0756P4-2 INTERCHANGEABLE
Probe,ultrasonic Unit,diagnostic
Siemens Medical Solutions Usa, Inc. Dba Siemens Medical Solutions Usa Inc Div Siemens Healthineers
4320-01-695-4759P42 INTERCHANGEABLE
Pump,hydraulic Ram,hand Driven
Enerpac Tool Group Corp
Cross-Reference Index
Part NumberManufacturer
491-3479-3 Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA)
9102-4RED Tektest, Inc Dba E-Z-Hook Div E-Z-Hook, Division of Tektest, Inc. (USA)
4444-A-4-2 Mueller Electric Company, Inc. Div Mueller Electric Company (USA)
P4RED Fluke Electronics Corp Pomona Electronics Div (USA)
990C653H13 Northrop Grumman Systems Corporation Dba Electronic Systems (USA)
P-4-2 Fluke Electronics Corp Pomona Electronics Div (USA)
Related Parts
4320-00-122-0623INTERCHANGEABLE
PISTON,PUMP
P4-2
5340-00-200-8637INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
P42
5306-00-208-3075INTERCHANGEABLE
BOLT,INTERNAL WRENCHING
P42
5935-01-021-1042INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
NG0-092120-0004
4730-01-521-8312INTERCHANGEABLE
PLUG,PIPE
P42
2910-01-524-2734INTERCHANGEABLE
PUMP,HAND,FUEL PUMP
P-42
6525-01-583-0756INTERCHANGEABLE
PROBE,ULTRASONIC UNIT,DIAGNOSTIC
P4-2
4320-01-695-4759INTERCHANGEABLE
PUMP,HYDRAULIC RAM,HAND DRIVEN
P42

Frequently Asked Questions

What is NSN 6625-00-865-6643?

NSN 6625-00-865-6643 is a Lead,test, manufactured by Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-865-6643?

NSN 6625-00-865-6643 has 6 cross-referenced part numbers: 491-3479-3 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions), 9102-4RED (Tektest, Inc Dba E-Z-Hook Div E-Z-Hook, Division of Tektest, Inc.), 4444-A-4-2 (Mueller Electric Company, Inc. Div Mueller Electric Company), P4RED (Fluke Electronics Corp Pomona Electronics Div), 990C653H13 (Northrop Grumman Systems Corporation Dba Electronic Systems) and 1 more.

What NSN replaces 6625-00-865-6643?

There are 8 known substitutes for 6625-00-865-6643: 4320-00-122-0623, 5340-00-200-8637, 5306-00-208-3075 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 491-3479-3?

Key specifications for 491-3479-3: Strand Awg Size Per Conductor: 32 ALL CONDUCTORS; Cross Section Outside Diameter: 0.087 INCHES NOMINAL IN; Strand Quantity Per Conductor: 19 ALL CONDUCTORS; Material: PLASTIC POLYVINYL FIRST POSITION PRIMARY INSULATION SINGLE CONDUCTOR. 26 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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