The Head,linear Actuating Cylinder, cataloged under National Stock Number 1650-01-172-3633, 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 Thomas Instrument, Incorporated. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1650-01-172-3633 |
| Primary Part Number | 3251-019 |
| Item Name | Head,linear Actuating Cylinder |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Thomas Instrument, Incorporated |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3251-019 PRIMARY | Thomas Instrument, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 3251-019 | 5/9 Secondary reference Woodward Hrt, Inc. Dba Woodward Hrt Inc |
| 3251-019 | 5/9 Secondary reference U.S. Government activity |
| 3251-017 | 5/9 Secondary reference Woodward Hrt, Inc. Dba Woodward Hrt Inc |
NSN 1650-01-172-3633 is a Head,linear Actuating Cylinder, manufactured by Thomas Instrument, Incorporated, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-172-3633 has 1 manufacturer part number on file: 3251-019 (Thomas Instrument, Incorporated).
Key specifications for 3251-019: Special Features: COGNIZANT SERVICE:NAVY; End Item Identification: ACFT MODEL AV-8. 0 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 1650-01-172-3633 has DEMIL Code B. 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.