The Head,linear Actuating Cylinder, cataloged under National Stock Number 1650-01-255-4409, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-255-4409 |
| Primary Part Number | 128HM10339-1 |
| Item Name | Head,linear Actuating Cylinder |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Outside Diameter | 1.750 INCHES MAXIMUM IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 128HM10339-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 128HM10339-1 | 5/9 Secondary reference S & L Aerospace Metals Llc |
| 128HM10339-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 128HM10339 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 1650-01-255-4409 is a Head,linear Actuating Cylinder, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-255-4409 has 1 manufacturer part number on file: 128HM10339-1 (Northrop Grumman Systems Corporation).
Key specifications for 128HM10339-1: Outside Diameter: 1.750 INCHES MAXIMUM IN; Overall Length: 1.750 INCHES MAXIMUM IN; Special Features: 8 HOLES 0.256 IN.DIA,EQUALLY SPACED PARALLEL TO CYLINDER END;1.020 IN.BORE DIA SAME END WITH 0.815 IN.CONTER BORE DIA;0.520 IN.BORE DIA SECOND END IN; Material: STEEL. 2 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.
NSN 1650-01-255-4409 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.