The Control Unit,governor, cataloged under National Stock Number 2990-01-491-0252, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Governors America Corporation Dba Governors America Corp. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-01-491-0252 |
| Primary Part Number | ESD5500E |
| Item Name | Control Unit,governor |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Governors America Corporation Dba Governors America Corp |
| Status | ACTIVE |
| 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 |
|---|---|
| 1HARR/126-106 | Saab Aktiebolag Div Radar Solutions (SWE) |
| ESD5500E PRIMARY | Governors America Corporation Dba Governors America Corp (USA) |
| Reference | Meaning |
|---|---|
| ESD5500 | 5/9 Secondary reference Governors America Corporation Dba Governors America Corp |
| 1HARR/126-106 | 5/9 Secondary reference Saab Ab (publ) - Business Area Surveillance |
NSN 2990-01-491-0252 is a Control Unit,governor, manufactured by Governors America Corporation Dba Governors America Corp, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-491-0252 has 2 manufacturer part numbers on file: 1HARR/126-106 (Saab Aktiebolag Div Radar Solutions), ESD5500E (Governors America Corporation Dba Governors America Corp).
Key specifications for ESD5500E: Overall Length: 5.750 INCHES NOMINAL IN; Overall Width: 5.500 INCHES NOMINAL IN; Special Features: 12 OR 24 VDC BATTERY SYSTEM SUPPLY; SPEED SENSOR SIGNAL 0.5-120 VOLTS RMS; AMBIENT TEMPERATURE RANGE M40 TO 180 DEGREES F VDC; Part Name Assigned by Controlling Agency: SPEED CONTROL UNIT. 0 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.