The Spool and Sleeve Set,manifold, cataloged under National Stock Number 1650-00-103-3540, 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. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-103-3540 |
| Primary Part Number | HP878501 |
| Item Name | Spool and Sleeve Set,manifold |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF FSCM 84685 SPOOL HP878160&1,SLEEVE HP848139 |
| 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 |
|---|---|
| HP878501 PRIMARY | Tactair Fluid Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| HP878501 | 5/9 Secondary reference U.S. Government activity |
NSN 1650-00-103-3540 is a Spool and Sleeve Set,manifold, manufactured by Tactair Fluid Controls Inc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-103-3540 has 1 manufacturer part number on file: HP878501 (Tactair Fluid Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-923-7884. Verify interchangeability with system specifications before substitution.
Key specifications for HP878501: General Characteristics Item Description: CONSISTS OF FSCM 84685 SPOOL HP878160&1,SLEEVE HP848139; End Item Identification: 1650&087&4050. 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 1650-00-103-3540 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.