The Cover Assembly,governor, cataloged under National Stock Number 2990-00-391-6571, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Curtiss-Wright Controls, Inc. Div Actuation Division. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-391-6571 |
| Primary Part Number | 21-74776-00 |
| Item Name | Cover Assembly,governor |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Curtiss-Wright Controls, Inc. Div Actuation Division |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,10.500 IN. LG,5.025 IN. WIDTH,7.370 IN. O/A HEIGHT,COVERLOCKING MECHANISM IS BRASS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21-74776-00 PRIMARY | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
| 3276991 PRIMARY | Hatch & Kirk, Inc. (USA) |
| Reference | Meaning |
|---|---|
| G37BM16 | 5/9 Secondary reference Curtiss-Wright Controls, Inc. Div Actuation Division |
| 3276991 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
NSN 2990-00-391-6571 is a Cover Assembly,governor, manufactured by Curtiss-Wright Controls, Inc. Div Actuation Division, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-391-6571 has 2 manufacturer part numbers on file: 21-74776-00 (Curtiss-Wright Controls, Inc. Div Actuation Division), 3276991 (Hatch & Kirk, Inc.).
Key specifications for 21-74776-00: General Characteristics Item Description: STEEL,10.500 IN. LG,5.025 IN. WIDTH,7.370 IN. O/A HEIGHT,COVERLOCKING MECHANISM IS BRASS 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.