The Piston,actuator, cataloged under National Stock Number 1650-00-006-4394, 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 Kell-Strom Tool International, Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1650-00-006-4394 |
| Primary Part Number | A51H40517-11 |
| Item Name | Piston,actuator |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Kell-Strom Tool International, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,PASSIVATED FINISHED; 8.702 IN. O/A LG; 2.494 IN. OD; 16 HOLES EQUALLY SPACED; 0.254 IN. DIA IN |
| 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 |
|---|---|
| A51H40517-11 | Kell-Strom Tool International, Inc. (USA) |
| A51H40517-11 | K S W Machine Co (USA) |
| A51H40517-11 | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport (USA) |
| A51H40517-11 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| A51H40517-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
| A51H40517-11 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| A51H40517-11 | 5/9 Secondary reference Tek Precision Co Limited |
NSN 1650-00-006-4394 is a Piston,actuator, manufactured by Kell-Strom Tool International, Inc., classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-006-4394 has 4 manufacturer part numbers on file: A51H40517-11 (Kell-Strom Tool International, Inc.), A51H40517-11 (K S W Machine Co), A51H40517-11 (Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport), A51H40517-11 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems).
Key specifications for A51H40517-11: General Characteristics Item Description: CRES,PASSIVATED FINISHED; 8.702 IN. O/A LG; 2.494 IN. OD; 16 HOLES EQUALLY SPACED; 0.254 IN. DIA IN. 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.