The Shaft,shouldered, cataloged under National Stock Number 3040-01-166-6778, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Allied Engineering and Production Corporation. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-166-6778 |
| Primary Part Number | 4648155 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Allied Engineering and Production Corporation |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES |
| Step Quantity | 6 |
| First End Diameter | 2.1250 INCHES NOMINAL IN |
| Second End Diameter | 1.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 9.250 INCHES NOMINAL IN |
| Second End Keyway Width | 0.5000 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN |
| Second End Keyway Depth | 0.167 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAYS AND INTERNALLY THREADED |
| Second End Internal Thread Length | 1.125 INCHES NOMINAL IN |
| External Keyway Length | 8.500 INCHES NOMINAL SECOND END 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 |
|---|---|
| 4648155 | Allied Engineering and Production Corporation (USA) |
| 4648155 | Naval Inventory Control Point Mechanicsburg (USA) |
| 4648155 | Appleton Marine Inc (USA) |
| 4648155 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4648155 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-166-6778 is a Shaft,shouldered, manufactured by Allied Engineering and Production Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-166-6778 has 4 manufacturer part numbers on file: 4648155 (Allied Engineering and Production Corporation), 4648155 (Naval Inventory Control Point Mechanicsburg), 4648155 (Appleton Marine Inc), 4648155 (Lake Shore Systems, Inc.).
Key specifications for 4648155: Surface Finish: 16.0 MICROINCHES; Step Quantity: 6; First End Diameter: 2.1250 INCHES NOMINAL IN; Second End Diameter: 1.8750 INCHES NOMINAL IN. 11 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.