The Shaft,shouldered, cataloged under National Stock Number 3040-01-164-7820, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Aljers Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-164-7820 |
| Primary Part Number | 250556001 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Aljers Llc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Step Quantity | 13 |
| First End Diameter | 1.8740 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN |
| Second End Diameter | 1.2490 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN |
| Largest Step Diameter | 4.594 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 1.156 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.2500 INCHES NOMINAL IN |
| First End Keyway Depth | 0.250 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.125 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | INDENTED FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 3.750 INCHES NOMINAL FIRST END IN |
| External Keyway Length | 2.000 INCHES NOMINAL SECOND END IN |
| First End Keyway Width | 0.5000 INCHES NOMINAL 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 |
|---|---|
| 250556001 PRIMARY | Aljers Llc (USA) |
| Reference | Meaning |
|---|---|
| 250556-0-01 | 3/9 Design control — primary reference U.S. Government activity |
| 3505-13 | D/9 Drawing number reference only U.S. Government activity |
| 3505-13 PIECE 40 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-164-7820 is a Shaft,shouldered, manufactured by Aljers Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-164-7820 has 1 manufacturer part number on file: 250556001 (Aljers Llc).
Key specifications for 250556001: Surface Finish: 32.0 MICROINCHES; Step Quantity: 13; First End Diameter: 1.8740 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN; Second End Diameter: 1.2490 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN. 16 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.