PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5990-1Support,seat Fittin

The Boeing Company Div Legacy Am&m · NSN 1680-00-966-9918 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-966-9918 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-966-9918. Primary manufacturer part number: 5990-1.
Features
  • Support,seat Fittin — FSC 1680
  • 2 verified cross-references
  • Primary manufacturer: The Boeing Company Div Legacy Am&m
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Support,seat Fittin, cataloged under National Stock Number 1680-00-966-9918, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is The Boeing Company Div Legacy Am&m. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameSupport,seat Fittin
FSC / FSG1680 — No Item Name Available (FSG 16)
ManufacturersThe Boeing Company Div Legacy Am&m (CAGE 43999)
Technical Specifications
ParameterValue
NSN1680-00-966-9918
Primary Part Number5990-1
Item NameSupport,seat Fittin
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerThe Boeing Company Div Legacy Am&m
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
5120-00-360-57625990 INTERCHANGEABLE
Adapter,draw Bolt
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
5330-00-364-68450S30974 INTERCHANGEABLE
Gasket
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
5998-00-494-84235984 INTERCHANGEABLE
Electronic Components Assembly
Avo Intl
5360-00-500-276659901 INTERCHANGEABLE
Spring,helical,torsion
Associated Spring Corp Div of the Barnes Group Inc Dallas Div
5360-00-510-42005990 INTERCHANGEABLE
Spring,helical,compression
R.h. Industries, Inc.
5340-01-104-9826359-5990 INTERCHANGEABLE
Plug,vent
Stemco Inc Sub of Coltec Industries Inc
6920-01-208-997559901 INTERCHANGEABLE
Deploy Release Mechanism Assembl
Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc
6105-01-369-2427E971 INTERCHANGEABLE
Motor,alternating Current
General Electric Co Motor Business Group
6685-01-429-89221A21013H01 INTERCHANGEABLE
Probe,humidity-Temperature
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
2530-01-624-26035990 INTERCHANGEABLE
Shaft Tube
Teledyne Flir Unmanned Ground Systems, Inc
Cross-Reference Index
Part NumberManufacturer
5990 The Boeing Company Div Legacy Am&m (USA)
5990-1 PRIMARY The Boeing Company Div Legacy Am&m (USA)
Related Parts
5120-00-360-5762INTERCHANGEABLE
ADAPTER,DRAW BOLT
5990
5330-00-364-6845INTERCHANGEABLE
GASKET
0S30974
5998-00-494-8423INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY
5984
5360-00-500-2766INTERCHANGEABLE
SPRING,HELICAL,TORSION
59901
5360-00-510-4200INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5990
5340-01-104-9826INTERCHANGEABLE
PLUG,VENT
359-5990
6920-01-208-9975INTERCHANGEABLE
DEPLOY RELEASE MECHANISM ASSEMBL
59901
6105-01-369-2427INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
E971
6685-01-429-8922INTERCHANGEABLE
PROBE,HUMIDITY-TEMPERATURE
1A21013H01
2530-01-624-2603INTERCHANGEABLE
SHAFT TUBE
5990
5310-01-665-3599INTERCHANGEABLE
WASHER,RECESSED
5990

Frequently Asked Questions

What is NSN 1680-00-966-9918?

NSN 1680-00-966-9918 is a Support,seat Fittin, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 1680 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 1680-00-966-9918?

NSN 1680-00-966-9918 has 2 cross-referenced part numbers: 5990 (The Boeing Company Div Legacy Am&m), 5990-1 (The Boeing Company Div Legacy Am&m).

What NSN replaces 1680-00-966-9918?

There are 11 known substitutes for 1680-00-966-9918: 5120-00-360-5762, 5330-00-364-6845, 5998-00-494-8423 and 8 more. Verify interchangeability with system specifications before substitution.

Is NSN 1680-00-966-9918 still in active supply?

NSN 1680-00-966-9918 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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