The Cylinder Assembly,actuating,line, cataloged under National Stock Number 3040-01-421-9644, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-421-9644 |
| Item Name | Cylinder Assembly,actuating,line |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Mounting Facility Diameter | 0.562 INCHES NOMINAL IN |
| Pressure Rating | 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 165.0 FAHRENHEIT DEGF |
| Temp Rating | -10.0 FAHRENHEIT DEGF |
| Design Characteristics | SINGLE ACTING SINGLE CYLINDER |
| Port Thread Series Designator | UNS |
| First Piston Rod End Thread Quantity Per Inch | 16 |
| First End External Thread Length | 1.125 INCHES NOMINAL IN |
| Mounting Provision Arrangement Style | FOUR HOLE RECTANGULAR |
| First Piston Rod End Style | EXTERNAL THREADED |
| Longest Vertical Distance Between Mounting Centers | 3.250 INCHES NOMINAL IN |
| Port Thread Class | 2B |
| Port Thread Quantity Per Inch | 14 |
| Body Material | STEEL |
| Port Thread Diameter | 0.875 INCHES NOMINAL IN |
| Port Style | GASKET SEAL |
| First Piston Rod End Thread Series Designator | UNF |
| Mounting Provision for Which Designed | UNTHREADED MOUNTING HOLES |
| Integral Valve Operation Method | HYDRAULIC |
| Bore Diameter | 2.000 INCHES NOMINAL IN |
| Mounting Type and Location | LUG(S) CYLINDER HEAD END AND LUG(S) PISTON ROD END |
| First Piston Rod End Thread Diameter | 0.750 INCHES NOMINAL IN |
| First End Outside Diameter | 1.000 INCHES NOMINAL IN |
| Longest Horizontal Distance Between Mounting Centers | 10.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| EE114874A | 3/2 Design control — primary reference U.S. Government activity |
| 2CC2HKTVS14AC6.625 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-421-9644 is a Cylinder Assembly,actuating,line, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-422-0852, 3040-01-422-0855, 3040-01-423-2890. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-421-9644: Mounting Facility Diameter: 0.562 INCHES NOMINAL IN; Overall Height: 3.000 INCHES NOMINAL IN; Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 165.0 FAHRENHEIT DEGF. 24 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.