PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21904Piston,linear Actuating Cylinder

Mid-America Aerotech, Llc · NSN 1650-00-083-4040 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-083-4040 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-083-4040. Primary manufacturer part number: 21904.
Features
  • Piston,linear Actuating Cylinder — FSC 1650
  • Outside Diameter: 3.422 INCHES NOMINAL IN
  • Material: STEEL CORROSION RESISTING
  • 4 verified cross-references
  • Primary manufacturer: Mid-America Aerotech, Llc
Applications
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Piston,linear Actuating Cylinder, cataloged under National Stock Number 1650-00-083-4040, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Mid-America Aerotech, Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, 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
NSN1650-00-083-4040
Primary Part Number21904
Item NamePiston,linear Actuating Cylinder
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerMid-America Aerotech, Llc
StatusACTIVE
Outside Diameter3.422 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
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
4810-01-049-372321904 INTERCHANGEABLE
Plunger,valve
Eaton Aerospace Llc
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 Mid-America Aerotech, Llc (USA)
21904 Moog Inc Div Moog Inc., Space and Defense - Salt Lake City (USA)
21904 E-Systems Inc Montek Div Fluid Controls Opns (USA)
21904 Moog Inc (USA)
Related Parts
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
4810-01-049-3723INTERCHANGEABLE
PLUNGER,VALVE
21904
5940-01-089-2540INTERCHANGEABLE
TERMINAL,STUD
4878-14-1
3460-01-360-0376INTERCHANGEABLE
ARBOR,HOLE SAW
21904

Frequently Asked Questions

What is NSN 1650-00-083-4040?

NSN 1650-00-083-4040 is a Piston,linear Actuating Cylinder, manufactured by Mid-America Aerotech, Llc, classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-083-4040?

NSN 1650-00-083-4040 has 4 cross-referenced part numbers: 21904 (Mid-America Aerotech, Llc), 21904 (Moog Inc Div Moog Inc., Space and Defense - Salt Lake City), 21904 (E-Systems Inc Montek Div Fluid Controls Opns), 21904 (Moog Inc).

What NSN replaces 1650-00-083-4040?

There are 9 known substitutes for 1650-00-083-4040: 5930-00-101-2298, 3020-00-269-9687, 5965-00-404-0486 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21904?

Key specifications for 21904: Outside Diameter: 3.422 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING; Special Features: CHROME-PLATED; 1.063IN. W, 0.810IN. THK; 1 GROOVE 0.188IN. W, 0.242IN. DP IN. 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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