PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

90-121-4 ITEM 18Synchro Assembly

L3 Technologies, Inc. · NSN 5990-01-626-3840 · FSC 5990 · No Item Name Available
Verified by PartsTable
NSN 5990-01-626-3840 — this item is cataloged by the U.S. Government under National Stock Number 5990-01-626-3840. Primary manufacturer part number: 90-121-4 ITEM 18.
Features
  • Synchro Assembly — FSC 5990
  • 2 verified cross-references
  • Primary manufacturer: L3 Technologies, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Synchro Assembly, cataloged under National Stock Number 5990-01-626-3840, is classified within Federal Supply Class 5990 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is L3 Technologies, Inc.. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5990-01-626-3840
Primary Part Number90-121-4 ITEM 18
Item NameSynchro Assembly
FSC / FSG5990 / 59 — No Item Name Available
ManufacturerL3 Technologies, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5990-01-016-0245M20708/20-02C INTERCHANGEABLE
Synchro,transmitter
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
90-121-4 ITEM 18 L3 Technologies, Inc. (USA)
15CX6 L3 Technologies, Inc. (USA)
Related Parts
5990-01-016-0245INTERCHANGEABLE
SYNCHRO,TRANSMITTER
M20708/20-02C

Frequently Asked Questions

What is NSN 5990-01-626-3840?

NSN 5990-01-626-3840 is a Synchro Assembly, manufactured by L3 Technologies, Inc., classified under FSC 5990 (No Item Name Available). Status: active.

What are the part numbers for NSN 5990-01-626-3840?

NSN 5990-01-626-3840 has 2 cross-referenced part numbers: 90-121-4 ITEM 18 (L3 Technologies, Inc.), 15CX6 (L3 Technologies, Inc.).

What NSN replaces 5990-01-626-3840?

There is 1 known substitute for 5990-01-626-3840: 5990-01-016-0245. Verify interchangeability with system specifications before substitution.

What are the specifications of 90-121-4 ITEM 18?

Key specifications for 90-121-4 ITEM 18: End Item Identification: HELM CONSOLE; Special Features: STEERING INPUT UNIT SUBASSEMBLY; Part Name Assigned by Controlling Agency: SYNCHRO. 3 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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