PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21223JHeat Sink,electrical-Electronic

Smiths Aerospace, Inc., Electronic Systems-Grand Rapids · NSN 5999-01-124-1926 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-124-1926 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-124-1926. Primary manufacturer part number: 21223J.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • 2 verified cross-references
  • Primary manufacturer: Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-124-1926, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersSmiths Aerospace, Inc., Electronic Systems-Grand Rapids (CAGE 30377)
Technical Specifications
ParameterValue
NSN5999-01-124-1926
Primary Part Number21223J
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerSmiths Aerospace, Inc., Electronic Systems-Grand Rapids
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
1650-00-171-340621223 INTERCHANGEABLE
Stem and Seat Assembly
Eaton Aerospace Llc
5930-00-232-615821223 INTERCHANGEABLE
Switch,rotary
Raytheon Company Dba Raytheon
7320-00-390-1600 INTERCHANGEABLE
Knife,pastry
1680-00-534-7002 INTERCHANGEABLE
Sleeve,tube
3020-00-591-2674217D INTERCHANGEABLE
Pulley,groove
Industrial Technologies and Services Llc
5910-00-819-4914 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
5998-01-042-807721223 INTERCHANGEABLE
Circuit Card Assembly
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
1680-01-043-8759PM21223 INTERCHANGEABLE
Trigger,phenolic
Mason Electric Co. Dba Mason Controls
5305-01-074-968221223 INTERCHANGEABLE
Screw,cap,hexagon Head
Lawson Products, Inc.
5136-01-443-349521223 INTERCHANGEABLE
Tap,thread Cutting
Time Fastener Co Inc
Cross-Reference Index
Part NumberManufacturer
21223J PRIMARY Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
21223 PRIMARY Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
Related Parts
1650-00-171-3406INTERCHANGEABLE
STEM AND SEAT ASSEMBLY
21223
5930-00-232-6158INTERCHANGEABLE
SWITCH,ROTARY
21223
7320-00-390-1600INTERCHANGEABLE
KNIFE,PASTRY
1680-00-534-7002INTERCHANGEABLE
SLEEVE,TUBE
3020-00-591-2674INTERCHANGEABLE
PULLEY,GROOVE
217D
5910-00-819-4914INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
5998-01-042-8077INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21223
1680-01-043-8759INTERCHANGEABLE
TRIGGER,PHENOLIC
PM21223
5305-01-074-9682INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
21223
5136-01-443-3495INTERCHANGEABLE
TAP,THREAD CUTTING
21223

Frequently Asked Questions

What is NSN 5999-01-124-1926?

NSN 5999-01-124-1926 is a Heat Sink,electrical-Electronic, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-124-1926?

NSN 5999-01-124-1926 has 2 cross-referenced part numbers: 21223J (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids), 21223 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).

What NSN replaces 5999-01-124-1926?

There are 10 known substitutes for 5999-01-124-1926: 1650-00-171-3406, 5930-00-232-6158, 7320-00-390-1600 and 7 more. Verify interchangeability with system specifications before substitution.

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