The Piston,flutter Dampener, cataloged under National Stock Number 1650-00-494-3640, 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 Tactair Fluid Controls Inc Western Hydraulics Div. 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 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 | 1650-00-494-3640 |
| Primary Part Number | 4-3448-31 |
| Item Name | Piston,flutter Dampener |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Tactair Fluid Controls Inc Western Hydraulics Div |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,1.988 IN. MIN 1.990 IN. MAX OD 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 |
| Part Number | Manufacturer |
|---|---|
| 4-3448-31 PRIMARY | Tactair Fluid Controls Inc Western Hydraulics Div (USA) |
NSN 1650-00-494-3640 is a Piston,flutter Dampener, manufactured by Tactair Fluid Controls Inc Western Hydraulics Div, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-494-3640 has 1 manufacturer part number on file: 4-3448-31 (Tactair Fluid Controls Inc Western Hydraulics Div).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-319-3072. Verify interchangeability with system specifications before substitution.
Key specifications for 4-3448-31: General Characteristics Item Description: ALUMINUM ALLOY,1.988 IN. MIN 1.990 IN. MAX OD 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 1650-00-494-3640 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.