The Shaft,shouldered, cataloged under National Stock Number 3040-01-313-5438, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-313-5438 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Step Quantity | 10 |
| First End Diameter | 0.3730 INCHES NOMINAL IN |
| Second End Diameter | 0.9990 INCHES NOMINAL IN |
| Largest Step Diameter | 2.0000 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 1.1800 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Keyway Width | 0.1872 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | WOODRUFF KEYWAY AND INTERNALLY THREADED |
| Material | ALUMINUM ALLOY |
| Second End Internal Thread Length | 0.3000 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 |
|---|---|
| 4775361 | D/9 Drawing number reference only U.S. Government activity |
| 4775361 ITEM 5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-313-5438 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-313-5484. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-313-5438: Step Quantity: 10; First End Diameter: 0.3730 INCHES NOMINAL IN; Second End Diameter: 0.9990 INCHES NOMINAL IN; Largest Step Diameter: 2.0000 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.