PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TN777Circuit Card Assembly

American Telephone and Telegraph Co · NSN 5998-01-363-6995 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-363-6995 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-363-6995. Primary manufacturer part number: TN777.
Features
  • Circuit Card Assembly — FSC 5998
  • 7 verified cross-references
  • Primary manufacturer: American Telephone and Telegraph Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-01-363-6995, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is American Telephone and Telegraph Co. This item has 7 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 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)
ManufacturersAmerican Telephone and Telegraph Co (CAGE 64959); Lucent Technologies Inc Dba Federal Marketing Group (CAGE 06KW9); Lucent Technologies Inc Corporate Headquarters (CAGE 3B4M0)
Technical Specifications
ParameterValue
NSN5998-01-363-6995
Primary Part NumberTN777
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerAmerican Telephone and Telegraph Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 2
5915-01-431-4256TN777 INTERCHANGEABLE
Network,hybrid Circuit
Avaya Inc Dba Avaya Government Solutions
5895-01-442-997263153 INTERCHANGEABLE
Interface Unit,communication Equ
Avaya Federal Solutions, Inc
Cross-Reference Index
Part NumberManufacturer
TN777 American Telephone and Telegraph Co (USA)
MP200038 ITEM 523 Lucent Technologies Inc Dba Federal Marketing Group (USA)
MP200038 ITEM 523 Lucent Technologies Inc Corporate Headquarters (USA)
MP200038 ITEM 523 American Telephone and Telegraph Co (USA)
TN777 Lucent Technologies Inc Dba Federal Marketing Group (USA)
103557302 American Telephone and Telegraph Co (USA)
103557302 Lucent Technologies Inc Dba Federal Marketing Group (USA)
Related Parts
5915-01-431-4256INTERCHANGEABLE
NETWORK,HYBRID CIRCUIT
TN777
5895-01-442-9972INTERCHANGEABLE
INTERFACE UNIT,COMMUNICATION EQU
63153

Frequently Asked Questions

What is NSN 5998-01-363-6995?

NSN 5998-01-363-6995 is a Circuit Card Assembly, manufactured by American Telephone and Telegraph Co, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-363-6995?

NSN 5998-01-363-6995 has 7 cross-referenced part numbers: TN777 (American Telephone and Telegraph Co), MP200038 ITEM 523 (Lucent Technologies Inc Dba Federal Marketing Group), MP200038 ITEM 523 (Lucent Technologies Inc Corporate Headquarters), MP200038 ITEM 523 (American Telephone and Telegraph Co), TN777 (Lucent Technologies Inc Dba Federal Marketing Group) and 2 more.

What NSN replaces 5998-01-363-6995?

There are 2 known substitutes for 5998-01-363-6995: 5915-01-431-4256, 5895-01-442-9972. Verify interchangeability with system specifications before substitution.

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