PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21971Circuit Card Assembly

Spectral Dynamics Inc · NSN 5998-01-087-7807 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-087-7807 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-087-7807. Primary manufacturer part number: 21971.
Features
  • Circuit Card Assembly — FSC 5998
  • 4 verified cross-references
  • Primary manufacturer: Spectral Dynamics Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-01-087-7807, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Spectral Dynamics Inc. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5998-01-087-7807
Primary Part Number21971
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerSpectral Dynamics Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality Code00
Unit of IssueEA
SMR CodeV
Weight0.5600 lbs
Cube0.1985 cu ft
Verified Substitutes 6
Circuit Card Assembly
5930-00-018-1244900027-107 INTERCHANGEABLE
Switch,rotary
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
4820-00-064-742020137PC15-17T024 INTERCHANGEABLE
Seat,valve
Velan Valve Corp.
1660-00-943-799121971-1 INTERCHANGEABLE
Cover,transformer
Hamilton Sundstrand Corporation Dba Collins Aerospace
5330-01-018-5422N49677PC217 INTERCHANGEABLE
Gasket
Todd Combustion Inc
3040-01-572-3192 INTERCHANGEABLE
Milwaukee Cylinder
Cross-Reference Index
Part NumberManufacturer
21971 Meggitt (orange County), Inc. (USA)
21971 PRIMARY Spectral Dynamics Inc (USA)
4831 ITEM 3 Meggitt (orange County), Inc. (USA)
4831 ITEM 3 Spectral Dynamics Inc (USA)
Related Parts
5998-01-077-6128SUCCESSOR
CIRCUIT CARD ASSEMBLY
5930-00-018-1244INTERCHANGEABLE
SWITCH,ROTARY
900027-107
4820-00-064-7420INTERCHANGEABLE
SEAT,VALVE
20137PC15-17T024
1660-00-943-7991INTERCHANGEABLE
COVER,TRANSFORMER
21971-1
5330-01-018-5422INTERCHANGEABLE
GASKET
N49677PC217
3040-01-572-3192INTERCHANGEABLE
MILWAUKEE CYLINDER

Frequently Asked Questions

What is NSN 5998-01-087-7807?

NSN 5998-01-087-7807 is a Circuit Card Assembly, manufactured by Spectral Dynamics Inc, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-087-7807?

NSN 5998-01-087-7807 has 4 cross-referenced part numbers: 21971 (Meggitt (orange County), Inc.), 21971 (Spectral Dynamics Inc), 4831 ITEM 3 (Meggitt (orange County), Inc.), 4831 ITEM 3 (Spectral Dynamics Inc).

What NSN replaces 5998-01-087-7807?

There are 6 known substitutes for 5998-01-087-7807: 5998-01-077-6128, 5930-00-018-1244, 4820-00-064-7420 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21971?

Key specifications for 21971: Special Features: PRINTED WIRING BOARD 1,CAPACITOR 22,RESISTOR 34,MICROCIRCUIT 4; Special Features: PRINTED WIRING BOARD 1,CAPACITOR 22,RESISTOR 34,MICROCIRCUIT 4. 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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