The Parts Kit,reservoir,hydraulic Fl, cataloged under National Stock Number 1650-00-159-7757, 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 1 specification, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1650-00-159-7757 |
| Primary Part Number | A51HGSK20-100 |
| Item Name | Parts Kit,reservoir,hydraulic Fl |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | C/O 1 PACKING,PREFORMED MS28775-446,1 PACKING,PREFORMED MS28775-223,1 RETAINER MS28774-443,2 RETAINERS MS28774-223,1 RETAINER MS28774-218,1 SEAL,RING GS570CL4 FSCM 26512,1 SEAL,RINGGS570CL1 FSCM 26512 |
| 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 |
|---|---|
| A51HGSK20-100 | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport (USA) |
| A51HGSK20-100 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| A51HGSK20-100 | System Technical Support Corporation Dba System Technical Support (USA) |
| A51HGSK20-100 | Quality Components (USA) |
| A51HGSK20-100 | Fluidonics Inc (USA) |
| A51HGSK20-100 | J and B Owl Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| A51HGSK20-100 | 5/9 Secondary reference Gks Inc |
| A51HGSK20-100 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51HGSK20-100 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 1650-00-159-7757 is a Parts Kit,reservoir,hydraulic Fl, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-159-7757 has 6 manufacturer part numbers on file: A51HGSK20-100 (Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport), A51HGSK20-100 (Northrop Grumman Systems Corporation), A51HGSK20-100 (System Technical Support Corporation Dba System Technical Support), A51HGSK20-100 (Quality Components), A51HGSK20-100 (Fluidonics Inc) and 1 more.
Key specifications for A51HGSK20-100: General Characteristics Item Description: C/O 1 PACKING,PREFORMED MS28775-446,1 PACKING,PREFORMED MS28775-223,1 RETAINER MS28774-443,2 RETAINERS MS28774-223,1 RETAINER MS28774-218,1 SEAL,RING GS570CL4 FSCM 26512,1 SEAL,RINGGS570CL1 FSCM 26512. 1 specification is 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.