PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21971Circuit Card Assembly

Ocean Technology Inc · NSN 5998-01-077-6128 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-077-6128 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-077-6128. Primary manufacturer part number: 21971.
Features
  • Circuit Card Assembly — FSC 5998
  • 2 verified cross-references
  • Primary manufacturer: Ocean Technology Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-01-077-6128, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Ocean Technology Inc. This item has 2 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.

Technical Specifications
ParameterValue
NSN5998-01-077-6128
Primary Part Number21971
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerOcean Technology Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5998-01-087-7807 (21971)
HAZMATNo
Shelf Life Code0
Criticality Code00
Unit of IssueEA
SMR CodeCE
Weight1.8600 lbs
Cube0.1771 cu ft
Verified Substitutes 10
5998-01-087-780721971 SUCCESSOR
Circuit Card Assembly
Spectral Dynamics Inc
5999-01-426-51016071-1 SUCCESSOR
Keyboard,data Entry
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5930-00-018-1244900027-107 INTERCHANGEABLE
Switch,rotary
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
4820-00-064-742020137PC15-17T024 INTERCHANGEABLE
Seat,valve
Velan Valve Corp.
6675-00-356-511860-711 INTERCHANGEABLE
Level,spirit
Warren Industries Inc Dba Warren Industries Inc Div Warren-Knight Instrument Co. and N. Amer. Survey Supply Co.
1660-00-943-799121971-1 INTERCHANGEABLE
Cover,transformer
Hamilton Sundstrand Corporation Dba Collins Aerospace
5330-01-018-5422N49677PC217 INTERCHANGEABLE
Gasket
Todd Combustion Inc
4820-01-088-471560711 INTERCHANGEABLE
Disk,valve
Waterous Company
4820-01-103-688060711 INTERCHANGEABLE
Valve
Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint
3040-01-572-3192 INTERCHANGEABLE
Milwaukee Cylinder
Cross-Reference Index
Part NumberManufacturer
21971 Ocean Technology Inc (USA)
60711 Dynalex Inc Sub of Ocean Technology Inc an Affil of Zero Corp (USA)
Related Parts
SUCCESSOR 5998-01-087-7807 Circuit Card Assembly · 21971
5999-01-426-5101SUCCESSOR
KEYBOARD,DATA ENTRY
6071-1
5930-00-018-1244INTERCHANGEABLE
SWITCH,ROTARY
900027-107
4820-00-064-7420INTERCHANGEABLE
SEAT,VALVE
20137PC15-17T024
6675-00-356-5118INTERCHANGEABLE
LEVEL,SPIRIT
60-711
1660-00-943-7991INTERCHANGEABLE
COVER,TRANSFORMER
21971-1
5330-01-018-5422INTERCHANGEABLE
GASKET
N49677PC217
4820-01-088-4715INTERCHANGEABLE
DISK,VALVE
60711
4820-01-103-6880INTERCHANGEABLE
VALVE
60711
3040-01-572-3192INTERCHANGEABLE
MILWAUKEE CYLINDER

Frequently Asked Questions

What is NSN 5998-01-077-6128?

NSN 5998-01-077-6128 is a Circuit Card Assembly, manufactured by Ocean Technology Inc, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-077-6128?

NSN 5998-01-077-6128 has 2 cross-referenced part numbers: 21971 (Ocean Technology Inc), 60711 (Dynalex Inc Sub of Ocean Technology Inc an Affil of Zero Corp).

What NSN replaces 5998-01-077-6128?

There are 10 known substitutes for 5998-01-077-6128: 5998-01-087-7807, 5999-01-426-5101, 5930-00-018-1244 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21971?

Key specifications for 21971: Special Features: MTG CONFIGURATION:PLUG IN AND RACK MTD W/PRINTED WIRING BOARD CONTACTS; End Item Identification: CIRCUIT CARD ASSEMBLY; Special Features: MTG CONFIGURATION:PLUG IN AND RACK MTD W/PRINTED WIRING BOARD CONTACTS; End Item Identification: CIRCUIT CARD ASSEMBLY. 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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