PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21904Plunger,valve

Eaton Aerospace Llc · NSN 4810-01-049-3723 · FSC 4810 · No Item Name Available
Verified by PartsTable
NSN 4810-01-049-3723 — this item is cataloged by the U.S. Government under National Stock Number 4810-01-049-3723. Primary manufacturer part number: 21904.
Features
  • Plunger,valve — FSC 4810
  • Criticality Code Justification: FEAT
  • General Characteristics Item Description: NICKEL PLATED; 1.178 IN. LG,0.300 IN. OD IN
  • 1 verified cross-reference
  • Primary manufacturer: Eaton Aerospace Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Plunger,valve, cataloged under National Stock Number 4810-01-049-3723, is classified within Federal Supply Class 4810 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4810-01-049-3723
Primary Part Number21904
Item NamePlunger,valve
FSC / FSG4810 / 48 — No Item Name Available
ManufacturerEaton Aerospace Llc
StatusACTIVE
Criticality Code JustificationFEAT
General Characteristics Item DescriptionNICKEL PLATED; 1.178 IN. LG,0.300 IN. OD IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
1650-00-083-404021904 INTERCHANGEABLE
Piston,linear Actuating Cylinder
Mid-America Aerotech, Llc
5930-00-101-22982890907-1 INTERCHANGEABLE
Switch,thermostatic
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
3020-00-269-968799121904 INTERCHANGEABLE
Gear,spur
Alfa Laval Inc
5965-00-404-048621904 INTERCHANGEABLE
Shell,microphone
Astrocom Electronics Inc
4330-00-478-657421904 INTERCHANGEABLE
Filter,special
Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div
5310-00-741-137921-904 INTERCHANGEABLE
Nut,plain,octagon
Pdi Ground Support Systems, Inc.
5342-01-011-022921904 INTERCHANGEABLE
Handle,handwheel
Jergens Inc Div Tooling Components Division
5940-01-089-25404878-14-1 INTERCHANGEABLE
Terminal,stud
Advanced Interconnections Corporation
3460-01-360-037621904 INTERCHANGEABLE
Arbor,hole Saw
Black and Decker Us Inc
Cross-Reference Index
Part NumberManufacturer
21904 PRIMARY Eaton Aerospace Llc (USA)
Related Parts
1650-00-083-4040INTERCHANGEABLE
PISTON,LINEAR ACTUATING CYLINDER
21904
5930-00-101-2298INTERCHANGEABLE
SWITCH,THERMOSTATIC
2890907-1
3020-00-269-9687INTERCHANGEABLE
GEAR,SPUR
99121904
5965-00-404-0486INTERCHANGEABLE
SHELL,MICROPHONE
21904
4330-00-478-6574INTERCHANGEABLE
FILTER,SPECIAL
21904
5310-00-741-1379INTERCHANGEABLE
NUT,PLAIN,OCTAGON
21-904
5342-01-011-0229INTERCHANGEABLE
HANDLE,HANDWHEEL
21904
5940-01-089-2540INTERCHANGEABLE
TERMINAL,STUD
4878-14-1
3460-01-360-0376INTERCHANGEABLE
ARBOR,HOLE SAW
21904

Frequently Asked Questions

What is NSN 4810-01-049-3723?

NSN 4810-01-049-3723 is a Plunger,valve, manufactured by Eaton Aerospace Llc, classified under FSC 4810 (No Item Name Available). Status: active.

What are the part numbers for NSN 4810-01-049-3723?

NSN 4810-01-049-3723 has 1 cross-referenced part number: 21904 (Eaton Aerospace Llc).

What NSN replaces 4810-01-049-3723?

There are 9 known substitutes for 4810-01-049-3723: 1650-00-083-4040, 5930-00-101-2298, 3020-00-269-9687 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21904?

Key specifications for 21904: Criticality Code Justification: FEAT; Special Features: WEAPON SYSTEM ESSENTIAL; End Item Identification: T-34 ENGINE; A-10 AND S-3A AIRCRAFT A; General Characteristics Item Description: NICKEL PLATED; 1.178 IN. LG,0.300 IN. OD IN. 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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