The Adapter,flywheel Housing, cataloged under National Stock Number 2990-01-730-9910, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-730-9910 |
| Primary Part Number | 645-9414 |
| Item Name | Adapter,flywheel Housing |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Functional Description | AN ENGINE BARRING TOOL IS DESIGNED TO FACILITATE MANUAL ROTATION OF THE ENGINE CRANKSHAFT.THIS ROTATION IS NECESSARY FOR DIFFERENT MAINTENANCE TASKS,SUCH AS SETTING ENGINE TIMING,ADJUSTING VALVE CLEARANCES,AND INSPECTING INTERNAL COMPONENTS.BY MANUALY TURNING THE CRANKSHAFT,TECHNICIANS CAN POSITION PISTONS AND VALVES CORRECTLY,ENSURING PROPER ENGINE OPERATION AND PERFORMANCE |
| 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 |
|---|---|
| 645-9414 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2990-01-730-9910 is a Adapter,flywheel Housing, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-730-9910 has 1 manufacturer part number on file: 645-9414 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 645-9414: Functional Description: AN ENGINE BARRING TOOL IS DESIGNED TO FACILITATE MANUAL ROTATION OF THE ENGINE CRANKSHAFT.THIS ROTATION IS NECESSARY FOR DIFFERENT MAINTENANCE TASKS,SUCH AS SETTING ENGINE TIMING,ADJUSTING VALVE CLEARANCES,AND INSPECTING INTERNAL COMPONENTS.BY MANUALY TURNING THE CRANKSHAFT,TECHNICIANS CAN POSITION PISTONS AND VALVES CORRECTLY,ENSURING PROPER ENGINE OPERATION AND PERFORMANCE; Part Name Assigned by Controlling Agency: ENGINE BARRING TOOL; End Item Identification: NSN:1905-01-154-1191. 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.