The Switch,overspeed, cataloged under National Stock Number 2990-00-778-2804, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 2990-00-778-2804 |
| Item Name | Switch,overspeed |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| General Characteristics Item Description | WITH RESET NORMALLY OPEN;TRIPS AT 1950 RPM RPM |
| 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 |
|---|---|
| 87152 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| 29751 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| GC11009AR1-2000 | 5/9 Secondary reference Pierce Co Inc the Sub of Avis Industrial Corp |
| 29751 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
| 87152 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 2990-00-778-2804 is a Switch,overspeed, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4320-01-043-2523, 5342-01-049-5439, 6135-01-606-0596. Verify interchangeability with system specifications before substitution.
Key specifications for 2990-00-778-2804: General Characteristics Item Description: WITH RESET NORMALLY OPEN;TRIPS AT 1950 RPM RPM. 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.