PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1638Circuit Card Assembly

National Security Agency · NSN 5998-00-153-5724 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-00-153-5724 — this item is cataloged by the U.S. Government under National Stock Number 5998-00-153-5724. Primary manufacturer part number: 1638.
Features
  • Circuit Card Assembly — FSC 5998
  • 1 verified cross-reference
  • Primary manufacturer: National Security Agency
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-00-153-5724, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is National Security Agency. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5998-00-153-5724
Primary Part Number1638
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerNational Security Agency
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeY
Verified Substitutes 12
5999-00-500-8883D7689 SUCCESSOR
Contact,electrical
Siemens Energy and Automation Inc Siemens Furnas Controls Div
4920-00-001-391316-38 INTERCHANGEABLE
Bubble,collimator
Taylor Hobson Ltd
6320-00-036-3674 INTERCHANGEABLE
Tube Shield
6240-00-155-8686 INTERCHANGEABLE
Lamp,incandescent
5120-00-221-182810-T INTERCHANGEABLE
Clamp,brake Lining
Star Machine & Tool Co Dba Star Brakes
4730-00-289-16262010999 INTERCHANGEABLE
Fitting,lubrication
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
2520-00-311-160641053V INTERCHANGEABLE
Retainer,main Trasf
Navistar Intl Corp Truck Br Ohio Plant
5930-00-615-23069001TR3A INTERCHANGEABLE
Switch,push
Schneider Electric Usa, Inc.
5950-00-983-9806D0T38 INTERCHANGEABLE
Transformer,audio Frequency
Magnetika Inc
5895-01-051-9963151572-01 INTERCHANGEABLE
Converter,signal Data
Ge Aviation Systems Llc
Cross-Reference Index
Part NumberManufacturer
1638 PRIMARY National Security Agency (USA)
Related Parts
5999-00-500-8883SUCCESSOR
CONTACT,ELECTRICAL
D7689
4920-00-001-3913INTERCHANGEABLE
BUBBLE,COLLIMATOR
16-38
6320-00-036-3674INTERCHANGEABLE
TUBE SHIELD
6240-00-155-8686INTERCHANGEABLE
LAMP,INCANDESCENT
5120-00-221-1828INTERCHANGEABLE
CLAMP,BRAKE LINING
10-T
4730-00-289-1626INTERCHANGEABLE
FITTING,LUBRICATION
2010999
2520-00-311-1606INTERCHANGEABLE
RETAINER,MAIN TRASF
41053V
5930-00-615-2306INTERCHANGEABLE
SWITCH,PUSH
9001TR3A
5950-00-983-9806INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
D0T38
5895-01-051-9963INTERCHANGEABLE
CONVERTER,SIGNAL DATA
151572-01
5305-01-096-6732INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
1638
2090-01-139-6213INTERCHANGEABLE
CONNECTING ROD,WIPE
1279-117

Frequently Asked Questions

What is NSN 5998-00-153-5724?

NSN 5998-00-153-5724 is a Circuit Card Assembly, manufactured by National Security Agency, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-00-153-5724?

NSN 5998-00-153-5724 has 1 cross-referenced part number: 1638 (National Security Agency).

What NSN replaces 5998-00-153-5724?

There are 12 known substitutes for 5998-00-153-5724: 5999-00-500-8883, 4920-00-001-3913, 6320-00-036-3674 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1638?

Key specifications for 1638: Overall Length: 4.580 INCHES NOMINAL IN; Overall Width: 2.180 INCHES NOMINAL IN; End Item Identification: DEFENSE SPECIAL SECURITY COMMUNICATIONS SYSTEM PROJECT STRAWHAT; Overall Length: 4.580 INCHES NOMINAL IN. 6 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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