PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21078Circuit Card Assembly

Smiths Aerospace, Inc., Electronic Systems-Grand Rapids · NSN 5998-01-131-4656 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-131-4656 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-131-4656. Primary manufacturer part number: 21078.
Features
  • Circuit Card Assembly — FSC 5998
  • 1 verified cross-reference
  • 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 Circuit Card Assembly, cataloged under National Stock Number 5998-01-131-4656, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. This item has 1 commercial cross-reference 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.

Technical Specifications
ParameterValue
NSN5998-01-131-4656
Primary Part Number21078
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerSmiths Aerospace, Inc., Electronic Systems-Grand Rapids
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5999-00-990-4754SM-B-207040 SUCCESSOR
Contact,electrical
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3110-00-100-0632152C71 INTERCHANGEABLE
Cup,tapered Roller Bearing
Harbormaster Marine, Inc
5905-00-919-86132100-0059 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Keysight Technologies Inc
5905-01-307-2852 INTERCHANGEABLE
Resistor,fixed,wire Wound
6625-01-414-378021078 INTERCHANGEABLE
Probe-Lead Assembly,test
Viavi Solutionsllc
4820-01-436-014821081-1001-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-436-015621081-850-1 INTERCHANGEABLE
Sleeve and Slide,directional Con
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-436-289421081-1005-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
5340-01-442-6176210-78 INTERCHANGEABLE
Handle,manual Control
Columbus Jack Corporation Div Columbus Jack
4820-01-469-154321078-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21078 PRIMARY Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
Related Parts
5999-00-990-4754SUCCESSOR
CONTACT,ELECTRICAL
SM-B-207040
3110-00-100-0632INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
152C71
5905-00-919-8613INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-0059
5905-01-307-2852INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
6625-01-414-3780INTERCHANGEABLE
PROBE-LEAD ASSEMBLY,TEST
21078
4820-01-436-0148INTERCHANGEABLE
PISTON,VALVE
21081-1001-1
4820-01-436-0156INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
21081-850-1
4810-01-436-2894INTERCHANGEABLE
PISTON,VALVE
21081-1005-1
5340-01-442-6176INTERCHANGEABLE
HANDLE,MANUAL CONTROL
210-78
4820-01-469-1543INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21078-001

Frequently Asked Questions

What is NSN 5998-01-131-4656?

NSN 5998-01-131-4656 is a Circuit Card Assembly, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-131-4656?

NSN 5998-01-131-4656 has 1 cross-referenced part number: 21078 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).

What NSN replaces 5998-01-131-4656?

There are 10 known substitutes for 5998-01-131-4656: 5999-00-990-4754, 3110-00-100-0632, 5905-00-919-8613 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21078?

Key specifications for 21078: Special Features: PRINTED WIRING BOARD 1; CONNECTOR 1; RESISTOR 50; DIODE 12; Special Features: PRINTED WIRING BOARD 1; CONNECTOR 1; RESISTOR 50; DIODE 12. 2 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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