The Piston Assembly, cataloged under National Stock Number 1650-01-125-7181, 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 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-01-125-7181 |
| Item Name | Piston Assembly |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| General Characteristics Item Description | CRES PER AMS5629,COMPOSITION PH13-8;,12.955 IN. NOM LG; 2.239 IN. MIN 2.240 IN. MAX OD; 9/16-18UNJF-3B THD ONE END; SLOTTED DRIVF IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 287847-1 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
| 287847-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-01-125-7181 is a Piston Assembly, 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): 3448-01-449-0624. Verify interchangeability with system specifications before substitution.
Key specifications for 1650-01-125-7181: General Characteristics Item Description: CRES PER AMS5629,COMPOSITION PH13-8;,12.955 IN. NOM LG; 2.239 IN. MIN 2.240 IN. MAX OD; 9/16-18UNJF-3B THD ONE END; SLOTTED DRIVF 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.
NSN 1650-01-125-7181 has DEMIL Code Q. 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.