The Clapper Assembly,valve, cataloged under National Stock Number 1650-00-649-9993, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-649-9993 |
| Item Name | Clapper Assembly,valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| FSC Application Data | ACFT HYDRAULIC,VACUUM AND DE-ICING SYSTEM COMPONENTS |
| General Characteristics Item Description | C/O ONE EA SEAL,P/N 55405; HINGE,P/N 55401; RIVET,P/N 55404; SPACER,P/N 55406; WASHER,P/N 55402 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 55723 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-00-649-9993 is a Clapper Assembly,valve, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1650-01-651-8860. Verify interchangeability with system specifications before substitution.
Key specifications for 1650-00-649-9993: FSC Application Data: ACFT HYDRAULIC,VACUUM AND DE-ICING SYSTEM COMPONENTS; General Characteristics Item Description: C/O ONE EA SEAL,P/N 55405; HINGE,P/N 55401; RIVET,P/N 55404; SPACER,P/N 55406; WASHER,P/N 55402. 2 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.
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.