The Piston,hydraulic Accumulator, cataloged under National Stock Number 1650-01-545-5501, 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 Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-01-545-5501 |
| Primary Part Number | 556-7106779-51 |
| Item Name | Piston,hydraulic Accumulator |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 556-7106779-51 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H792-8002-51 | 5/2 Secondary reference U.S. Government activity |
NSN 1650-01-545-5501 is a Piston,hydraulic Accumulator, manufactured by Naval Sea Systems Command, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-545-5501 has 1 manufacturer part number on file: 556-7106779-51 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 2825-01-733-8951. Verify interchangeability with system specifications before substitution.
Key specifications for 556-7106779-51: End Item Identification: ACC, HYD 1300 CU IN. 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.
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.