The Wrench,main Bearing, cataloged under National Stock Number 5120-01-654-0544, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 2 specifications, 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 | 5120-01-654-0544 |
| Primary Part Number | 9U-5023 |
| Item Name | Wrench,main Bearing |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL; DOUBLE OFFSET ENDS; 1-5/16 IN. SOCKET AT ONE END, 1-1/8 IN. SOCKET AT OTHER; 3/4 IN. FEMALE SQ DRIVE IN |
| Functional Description | USED TO INSTALL/REMOVE CRANKSHAFT MAIN BEARING |
| 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 |
|---|---|
| 9U-5023 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5120-01-654-0544 is a Wrench,main Bearing, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-654-0544 has 1 manufacturer part number on file: 9U-5023 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 9U-5023: General Characteristics Item Description: STEEL; DOUBLE OFFSET ENDS; 1-5/16 IN. SOCKET AT ONE END, 1-1/8 IN. SOCKET AT OTHER; 3/4 IN. FEMALE SQ DRIVE IN; Functional Description: USED TO INSTALL/REMOVE CRANKSHAFT MAIN BEARING; End Item Identification: CATERPILLAR 3500 SERIES ENGINES. 2 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.