PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B421Circuit Card Assembly

Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan · NSN 5998-01-463-9931 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-463-9931 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-463-9931. Primary manufacturer part number: B421.
Features
  • Circuit Card Assembly — FSC 5998
  • 4 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 5998-01-463-9931, 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. This item has 4 commercial cross-references from 3 manufacturers, 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.

Catalog Facts
Item NameCircuit Card Assembly
FSC / FSG5998 — Circuit Card Assembly (FSG 59)
ManufacturersHewlett-Packard Company Dba HP (CAGE 28480); Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (CAGE 90536); Super Pc Memory, Inc. (CAGE 06MA7)
Technical Specifications
ParameterValue
NSN5998-01-463-9931
Primary Part NumberB421
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerLockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality Code00
Unit of IssueEA
SMR CodeY
Weight0.0055 lbs
Cube0.0104 cu ft
Verified Substitutes 4
2540-00-040-2170B421 INTERCHANGEABLE
Stem
Opw Fueling Components Inc. Div Opw Fueling Components
3455-00-232-902858-10141 INTERCHANGEABLE
Cutter,milling,side
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
9150-00-261-8293B-421 INTERCHANGEABLE
Grease,plug Valve
Flowserve Us Inc. Dba Flowserve Div Flow Control - Oil and Gas Sector
5355-00-367-4671B421 INTERCHANGEABLE
Pointer,dial
Dresser, Llc
Cross-Reference Index
Part NumberManufacturer
A4503A-Q70 Hewlett-Packard Company Dba HP (USA)
79C0140-00 Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
B421 PRIMARY Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
CCH64-4503-Q70 Super Pc Memory, Inc. (USA)
Related Parts
2540-00-040-2170INTERCHANGEABLE
STEM
B421
3455-00-232-9028INTERCHANGEABLE
CUTTER,MILLING,SIDE
58-10141
9150-00-261-8293INTERCHANGEABLE
GREASE,PLUG VALVE
B-421
5355-00-367-4671INTERCHANGEABLE
POINTER,DIAL
B421

Frequently Asked Questions

What is NSN 5998-01-463-9931?

NSN 5998-01-463-9931 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 5998-01-463-9931?

NSN 5998-01-463-9931 has 4 cross-referenced part numbers: A4503A-Q70 (Hewlett-Packard Company Dba HP), 79C0140-00 (Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan), B421 (Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan), CCH64-4503-Q70 (Super Pc Memory, Inc.).

What NSN replaces 5998-01-463-9931?

There are 4 known substitutes for 5998-01-463-9931: 2540-00-040-2170, 3455-00-232-9028, 9150-00-261-8293 and 1 more. Verify interchangeability with system specifications before substitution.

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