The Dampener,fluid Pressure, cataloged under National Stock Number 1650-01-348-3935, 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 Operating & Maintenance Specialties Inc. Government technical data includes 3 specifications, 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 | 1650-01-348-3935 |
| Primary Part Number | 78S |
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Operating & Maintenance Specialties Inc |
| Status | ACTIVE |
| Operating Pressure Range | +0.0 TO 5000.0 POUNDS PER SQUARE INCH LBS |
| Nominal Pipe Size Designation | 0.250 INCHES IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 78S PRIMARY | Operating & Maintenance Specialties Inc (USA) |
NSN 1650-01-348-3935 is a Dampener,fluid Pressure, manufactured by Operating & Maintenance Specialties Inc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-348-3935 has 1 manufacturer part number on file: 78S (Operating & Maintenance Specialties Inc).
1 possible match (shared part number, not a government interchangeability claim): 6140-01-568-8482. Verify interchangeability with system specifications before substitution.
Key specifications for 78S: Operating Pressure Range: +0.0 TO 5000.0 POUNDS PER SQUARE INCH LBS; Nominal Pipe Size Designation: 0.250 INCHES IN; Material: STEEL CORROSION RESISTING. 3 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 1650-01-348-3935 has DEMIL Code B. 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.