NSN 2990-01-075-3957 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-075-3957. Manufacturer of record part number: SA0478G.
General Characteristics Item Description: UNIT OF GOVERNOR AND OVERSPEED SWITCH ASSEMBLY;TRIP SPEED 500-1380 RPM;APPL JOHN R HOLLINGWORTH ENGINE GENERATOR 62.5KVA RPM
The Overspeed Switch Assembly, cataloged under National Stock Number 2990-01-075-3957, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Woodward Controls Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
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Frequently Asked Questions
What is NSN 2990-01-075-3957?
NSN 2990-01-075-3957 is a Overspeed Switch Assembly, manufactured by Woodward Controls Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
What part numbers are listed for NSN 2990-01-075-3957?
NSN 2990-01-075-3957 has 3 manufacturer part numbers on file: SA0478G (Woodward Controls Inc.), SA322-4NC (Woodward Controls Inc.), SA478 (Woodward Controls Inc.).
What are the specifications of SA0478G?
Key specifications for SA0478G: General Characteristics Item Description: UNIT OF GOVERNOR AND OVERSPEED SWITCH ASSEMBLY;TRIP SPEED 500-1380 RPM;APPL JOHN R HOLLINGWORTH ENGINE GENERATOR 62.5KVA RPM. 1 specification is documented in the U.S. Government catalog.
Is NSN 2990-01-075-3957 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.