The Extension Unit,hydraulic, cataloged under National Stock Number 1650-00-477-4280, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-477-4280 |
| Item Name | Extension Unit,hydraulic |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| FSC Application Data | A-7D ACFT HYD SYSTEM |
| General Characteristics Item Description | 10.34 IN. RETRACTED,13.34 IN. EXTENDED,3000 PSIOPERATING PRESSURE TEMP RANGE -25 F TO 275 F IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| 215-32337-2 | 7/2 Vendor item drawing reference U.S. Government activity |
| 201765 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 201765 | 3/9 Design control — primary reference U.S. Government activity |
NSN 1650-00-477-4280 is a Extension Unit,hydraulic, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3510-01-142-0650. Verify interchangeability with system specifications before substitution.
Key specifications for 1650-00-477-4280: FSC Application Data: A-7D ACFT HYD SYSTEM; General Characteristics Item Description: 10.34 IN. RETRACTED,13.34 IN. EXTENDED,3000 PSIOPERATING PRESSURE TEMP RANGE -25 F TO 275 F IN. 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 1650-00-477-4280 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.