The Orifice Assembly,damper, cataloged under National Stock Number 1650-00-021-9917, 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 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-021-9917 |
| Item Name | Orifice Assembly,damper |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| General Characteristics Item Description | BERYLLIUM COPPER,HEAT TREAT ROCKWELL C 38 TO 42,0.203 TO 0.205 IN. LG,0.278 TO 0.280 IN. MAJOR OD,0.247 TO 0.249 IN. MINOR OD,0.0078 IN. ORIFICE DIA IN |
| 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 |
|---|---|
| 11340-8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-00-021-9917 is a Orifice Assembly,damper, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3020-00-376-5636, 5315-01-406-7882. Verify interchangeability with system specifications before substitution.
Key specifications for 1650-00-021-9917: General Characteristics Item Description: BERYLLIUM COPPER,HEAT TREAT ROCKWELL C 38 TO 42,0.203 TO 0.205 IN. LG,0.278 TO 0.280 IN. MAJOR OD,0.247 TO 0.249 IN. MINOR OD,0.0078 IN. ORIFICE DIA 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.
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.