The Piston Assembly, cataloged under National Stock Number 1650-01-175-8958, 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 S & L Aerospace Metals Llc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1650-01-175-8958 |
| Primary Part Number | 65661-06250-041 |
| Item Name | Piston Assembly |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | S & L Aerospace Metals Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 65661-06250-041 | S & L Aerospace Metals Llc (USA) |
| Reference | Meaning |
|---|---|
| 65661-06250-041 | 5/9 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| 65661-06252-041 | 5/9 Secondary reference Tek Precision Co Limited |
| 65661-06250-041 | 3/9 Design control — primary reference Tek Precision Co Limited |
NSN 1650-01-175-8958 is a Piston Assembly, manufactured by S & L Aerospace Metals Llc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-175-8958 has 1 manufacturer part number on file: 65661-06250-041 (S & L Aerospace Metals Llc).
Key specifications for 65661-06250-041: End Item Identification: AIRCRAFT CH-53E. 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.
NSN 1650-01-175-8958 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.