PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B420Circuit Card Assembly

Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan · NSN 5998-01-463-6984 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-463-6984 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-463-6984. Primary manufacturer part number: B420.
Features
  • Circuit Card Assembly — FSC 5998
  • Criticality Code Justification: FEAT
  • Criticality Code Justification: FEAT
  • 2 verified cross-references
  • Primary manufacturer: Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-01-463-6984, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5998-01-463-6984
Primary Part NumberB420
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerLockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
StatusACTIVE
Criticality Code JustificationFEAT
Criticality Code JustificationFEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality Code00
Unit of IssueEA
SMR CodeVH
Weight2.4380 lbs
Cube0.2361 cu ft
Verified Substitutes 4
5340-00-367-4670B420 INTERCHANGEABLE
Cover,access
Dresser, Llc
3455-00-517-555517446 INTERCHANGEABLE
Cutter,milling,side
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
5961-01-078-9494 INTERCHANGEABLE
Transistor
5945-01-198-6231307A8805P1 INTERCHANGEABLE
Relay,electromagnetic
Bae Systems Controls Inc.
Cross-Reference Index
Part NumberManufacturer
7382188-00 Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
B420 PRIMARY Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
Related Parts
5340-00-367-4670INTERCHANGEABLE
COVER,ACCESS
B420
3455-00-517-5555INTERCHANGEABLE
CUTTER,MILLING,SIDE
17446
5961-01-078-9494INTERCHANGEABLE
TRANSISTOR
5945-01-198-6231INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
307A8805P1

Frequently Asked Questions

What is NSN 5998-01-463-6984?

NSN 5998-01-463-6984 is a Circuit Card Assembly, manufactured by Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-463-6984?

NSN 5998-01-463-6984 has 2 cross-referenced part numbers: 7382188-00 (Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan), B420 (Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan).

What NSN replaces 5998-01-463-6984?

There are 4 known substitutes for 5998-01-463-6984: 5340-00-367-4670, 3455-00-517-5555, 5961-01-078-9494 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B420?

Key specifications for B420: Special Features: ITEMS ARE BEING CODED AS CRITICAL TO INSURE SOURCE INSPECTION WILL BE PERFORMED AT THE POINT OF MANUFACTURE, PRIOR TO MATERIAL RECEIPT BY THE US NAVY OR OTHER DOD COMPONENTS. THESE ITEMS ARE PIECE PARTS OR END ITEMS IN SUPPORT OF VITAL MILITARY HARDWARE NECESSARY TO SUSTAIN THE SUCCESSFUL MISSION OF THE SHIPS, SUBMARINES, AND SHORE STATIONS OF THE US NAVY. CRITICAL FEATURES INCLUDING, BUT NOT LIMITED TO, DIMENSIONS, TOLERANCES/CLEARANCES, ELECTRONIC CHARACTERISTICS, AND METALLURGICAL PROPERTIES WILL BESPECIFIED FOR GOVERNMENT Q AR (QUALITY ASSURANCE REPRESENTATIVES) TO INSURE THE HIGHEST POSSIBLE DEGREE OF QUALITY AND RELIABILITY OF THESE PARTS BEING DELIVERED UNDER NAVICP CONTRACTS; Criticality Code Justification: FEAT; Special Features: ITEMS ARE BEING CODED AS CRITICAL TO INSURE SOURCE INSPECTION WILL BE PERFORMED AT THE POINT OF MANUFACTURE, PRIOR TO MATERIAL RECEIPT BY THE US NAVY OR OTHER DOD COMPONENTS. THESE ITEMS ARE PIECE PARTS OR END ITEMS IN SUPPORT OF VITAL MILITARY HARDWARE NECESSARY TO SUSTAIN THE SUCCESSFUL MISSION OF THE SHIPS, SUBMARINES, AND SHORE STATIONS OF THE US NAVY. CRITICAL FEATURES INCLUDING, BUT NOT LIMITED TO, DIMENSIONS, TOLERANCES/CLEARANCES, ELECTRONIC CHARACTERISTICS, AND METALLURGICAL PROPERTIES WILL BESPECIFIED FOR GOVERNMENT Q AR (QUALITY ASSURANCE REPRESENTATIVES) TO INSURE THE HIGHEST POSSIBLE DEGREE OF QUALITY AND RELIABILITY OF THESE PARTS BEING DELIVERED UNDER NAVICP CONTRACTS; Criticality Code Justification: FEAT. 4 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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