PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

90558Disk and Seat,valve

Northrop Grumman Systems Corporation · NSN 1650-00-474-1972 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-474-1972 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-474-1972. Primary manufacturer part number: 90558.
Features
  • Disk and Seat,valve — FSC 1650
  • 1 verified cross-reference
  • Primary manufacturer: Northrop Grumman Systems Corporation
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Disk and Seat,valve, cataloged under National Stock Number 1650-00-474-1972, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Northrop Grumman Systems Corporation. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDisk and Seat,valve
FSC / FSG1650 — No Item Name Available (FSG 16)
ManufacturersNorthrop Grumman Systems Corporation (CAGE 26512)
Technical Specifications
ParameterValue
NSN1650-00-474-1972
Primary Part Number90558
Item NameDisk and Seat,valve
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5305-00-579-2139 INTERCHANGEABLE
Screw,machine
5930-01-025-920902-19-008A INTERCHANGEABLE
Switch,toggle
Hatco Corp
4920-01-138-235690558 INTERCHANGEABLE
Adapter,test
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
Cross-Reference Index
Part NumberManufacturer
90558 PRIMARY Northrop Grumman Systems Corporation (USA)
Related Parts
5305-00-579-2139INTERCHANGEABLE
SCREW,MACHINE
5930-01-025-9209INTERCHANGEABLE
SWITCH,TOGGLE
02-19-008A
4920-01-138-2356INTERCHANGEABLE
ADAPTER,TEST
90558

Frequently Asked Questions

What is NSN 1650-00-474-1972?

NSN 1650-00-474-1972 is a Disk and Seat,valve, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-474-1972?

NSN 1650-00-474-1972 has 1 cross-referenced part number: 90558 (Northrop Grumman Systems Corporation).

What NSN replaces 1650-00-474-1972?

There are 3 known substitutes for 1650-00-474-1972: 5305-00-579-2139, 5930-01-025-9209, 4920-01-138-2356. Verify interchangeability with system specifications before substitution.

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