The Piston and Seat Assembly, cataloged under National Stock Number 1650-00-140-1808, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-140-1808 |
| Primary Part Number | 26470 |
| Item Name | Piston and Seat Assembly |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF PISTON 1;SEAT 1;POPPET 1;HEADLESS PIN 1 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 26470 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 26470 | 5/9 Secondary reference United Technologies Corp Hamilton Sundstrand Corp |
NSN 1650-00-140-1808 is a Piston and Seat Assembly, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-140-1808 has 1 manufacturer part number on file: 26470 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
5 possible matches (shared part number, not a government interchangeability claim): 5950-00-517-8516, 5310-00-731-3293, 5330-01-333-2665. Verify interchangeability with system specifications before substitution.
Key specifications for 26470: General Characteristics Item Description: CONSISTS OF PISTON 1;SEAT 1;POPPET 1;HEADLESS PIN 1. 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 1650-00-140-1808 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.