The Shaft,shouldered, cataloged under National Stock Number 3040-01-179-9890, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-179-9890 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 7 |
| First End Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Second End Diameter | 1.2550 INCHES MINIMUM AND 1.2560 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.875 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 0.500 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.1880 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-16782 MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.125 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 | 0.500 INCHES NOMINAL SECOND END IN |
| External Keyway Length | 2.000 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.2500 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 |
| Reference | Meaning |
|---|---|
| B75475-A | 5/9 Secondary reference U.S. Government activity |
| D-34-942-82 | 5/9 Secondary reference U.S. Government activity |
| 90 89434 | 3/2 Design control — primary reference U.S. Government activity |
| D-34-942-82 PIECE 1 | 5/9 Secondary reference U.S. Government activity |
| 75475-A | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-179-9890 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-179-9890: Step Quantity: 7; First End Diameter: 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN; Second End Diameter: 1.2550 INCHES MINIMUM AND 1.2560 INCHES MAXIMUM IN; Largest Step Diameter: 1.875 INCHES NOMINAL 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.