PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3721Circuit Card Assembly

Naval Electronic Systems Security Engineering Center · NSN 5998-00-827-2018 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-00-827-2018 — this item is cataloged by the U.S. Government under National Stock Number 5998-00-827-2018. Primary manufacturer part number: 3721.
Features
  • Circuit Card Assembly — FSC 5998
  • 1 verified cross-reference
  • Primary manufacturer: Naval Electronic Systems Security Engineering Center
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-00-827-2018, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Naval Electronic Systems Security Engineering Center. 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
NSN5998-00-827-2018
Primary Part Number3721
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerNaval Electronic Systems Security Engineering Center
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 12
5330-00-154-49913721 INTERCHANGEABLE
Seal,plain Encased
Schindler Elevator Corporation
2530-00-192-8747 INTERCHANGEABLE
Cylinder,hydraulic Brake,wheel
5120-00-293-21363721 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5360-00-360-68993721 INTERCHANGEABLE
Spring,helical,torsion
Sachs-Boge of America
4920-00-435-9609372-1 INTERCHANGEABLE
Detector,voltage,test Set
General Dynamics Ots (aerospace), Inc. Dba General Dynamics Ordinance and Tactical Systems Div Seattle Operations
5995-00-711-67607116760 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Army, United States Department of the Dba Rock Island Arsenal Jmtc
1730-00-786-7347 INTERCHANGEABLE
Repair Kit,bearing,
5950-00-862-94443721 INTERCHANGEABLE
Reactor
Pulse Engineering Inc
4520-00-911-7979 INTERCHANGEABLE
Heating Element,electrical,nonim
5915-00-924-9599372-1 INTERCHANGEABLE
Filter,low Pass
American Trans-Coil Corp
Cross-Reference Index
Part NumberManufacturer
3721 Naval Electronic Systems Security Engineering Center (USA)
Related Parts
5330-00-154-4991INTERCHANGEABLE
SEAL,PLAIN ENCASED
3721
2530-00-192-8747INTERCHANGEABLE
CYLINDER,HYDRAULIC BRAKE,WHEEL
5120-00-293-2136INTERCHANGEABLE
WRENCH,OPEN END
3721
5360-00-360-6899INTERCHANGEABLE
SPRING,HELICAL,TORSION
3721
4920-00-435-9609INTERCHANGEABLE
DETECTOR,VOLTAGE,TEST SET
372-1
5995-00-711-6760INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
7116760
1730-00-786-7347INTERCHANGEABLE
REPAIR KIT,BEARING,
5950-00-862-9444INTERCHANGEABLE
REACTOR
3721
4520-00-911-7979INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
5915-00-924-9599INTERCHANGEABLE
FILTER,LOW PASS
372-1
8520-01-101-6948INTERCHANGEABLE
SHAMPOO
3721
5120-01-161-4543INTERCHANGEABLE
BIT,SCREWDRIVER
3-721

Frequently Asked Questions

What is NSN 5998-00-827-2018?

NSN 5998-00-827-2018 is a Circuit Card Assembly, manufactured by Naval Electronic Systems Security Engineering Center, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-00-827-2018?

NSN 5998-00-827-2018 has 1 cross-referenced part number: 3721 (Naval Electronic Systems Security Engineering Center).

What NSN replaces 5998-00-827-2018?

There are 12 known substitutes for 5998-00-827-2018: 5330-00-154-4991, 2530-00-192-8747, 5120-00-293-2136 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3721?

Key specifications for 3721: Overall Length: 6.486 INCHES NOMINAL IN; Overall Height: 1.000 INCHES NOMINAL IN; Overall Width: 4.437 INCHES NOMINAL IN; Special Features: CAPACITORS,FIXED,MICA 8; NUTS 8; PRINTED WIRING BOARD 1; RESISTORS,FIXED,COMPOSITION 22; RIVETS 3; SCREWS 6; SEMICONDUCTOR DEVICES,DIODE 8; SOCKETS,RELAY 2; SPACERS,CONNECTOR 2; TIME CONSTANT ASSEMBLIES 2; TRANSISTORS 8; TRANSISTOR MOUNTINGS 8. 8 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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