PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5621A OPTION 06Extender Card,electronic Test

Rolm Corp Mil Spec Computers · NSN 5998-00-545-4983 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-00-545-4983 — this item is cataloged by the U.S. Government under National Stock Number 5998-00-545-4983. Primary manufacturer part number: 5621A OPTION 06.
Features
  • Extender Card,electronic Test — FSC 5998
  • 3 verified cross-references
  • Primary manufacturer: Rolm Corp Mil Spec Computers
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Extender Card,electronic Test, cataloged under National Stock Number 5998-00-545-4983, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Rolm Corp Mil Spec Computers. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameExtender Card,electronic Test
FSC / FSG5998 — Circuit Card Assembly (FSG 59)
ManufacturersRolm Corp Mil Spec Computers (CAGE 14345); Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (CAGE 13499)
Successor NSN7025-01-523-1229 — Interface Unit,automatic Data Pr
Technical Specifications
ParameterValue
NSN5998-00-545-4983
Primary Part Number5621A OPTION 06
Item NameExtender Card,electronic Test
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerRolm Corp Mil Spec Computers
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor7025-01-523-1229 (5621)
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight1.0000 lbs
Cube0.1944 cu ft
Verified Substitutes 10
7025-01-523-12295621 SUCCESSOR
Interface Unit,automatic Data Pr
Stingray56 Inc.
6110-00-104-43415621 INTERCHANGEABLE
Protector,thermal-Overload,elect
Hdt Expeditionary Systems Inc
5905-00-141-1116 INTERCHANGEABLE
Resistor,fixed,composition
5910-00-332-0777SM-A-935135-1 INTERCHANGEABLE
Capacitor,variable,air Dielectri
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4720-00-541-07475621 INTERCHANGEABLE
Hose,air Duct
Flexco, Inc
5950-00-645-77615621 INTERCHANGEABLE
Transformer,audio Frequency
Precision Electronics, Inc
5975-00-661-1007 INTERCHANGEABLE
Box Connector,electrical
5895-00-784-3797712699-001 INTERCHANGEABLE
Core
Raytheon Company Dba Raytheon
5955-01-125-063256-2-1 INTERCHANGEABLE
Crystal Unit,quartz
Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled
4710-01-316-238356-21 INTERCHANGEABLE
Tube Assembly,metal
Chicago Faucet Co the
Cross-Reference Index
Part NumberManufacturer
5621A OPTION 06 Rolm Corp Mil Spec Computers (USA)
5621 Rolm Corp Mil Spec Computers (USA)
270-0395-320 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
Related Parts
SUCCESSOR 7025-01-523-1229 Interface Unit,automatic Data Pr · 5621
6110-00-104-4341INTERCHANGEABLE
PROTECTOR,THERMAL-OVERLOAD,ELECT
5621
5905-00-141-1116INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
5910-00-332-0777INTERCHANGEABLE
CAPACITOR,VARIABLE,AIR DIELECTRI
SM-A-935135-1
4720-00-541-0747INTERCHANGEABLE
HOSE,AIR DUCT
5621
5950-00-645-7761INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
5621
5975-00-661-1007INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5895-00-784-3797INTERCHANGEABLE
CORE
712699-001
5955-01-125-0632INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
56-2-1
4710-01-316-2383INTERCHANGEABLE
TUBE ASSEMBLY,METAL
56-21

Frequently Asked Questions

What is NSN 5998-00-545-4983?

NSN 5998-00-545-4983 is a Extender Card,electronic Test, manufactured by Rolm Corp Mil Spec Computers, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-00-545-4983?

NSN 5998-00-545-4983 has 3 cross-referenced part numbers: 5621A OPTION 06 (Rolm Corp Mil Spec Computers), 5621 (Rolm Corp Mil Spec Computers), 270-0395-320 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).

What NSN replaces 5998-00-545-4983?

There are 10 known substitutes for 5998-00-545-4983: 7025-01-523-1229, 6110-00-104-4341, 5905-00-141-1116 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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