The Shaft,shouldered, cataloged under National Stock Number 3040-01-434-7245, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-434-7245 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 2 |
| First End Diameter | 1.1245 INCHES NOMINAL IN |
| Second End Diameter | 1.3745 INCHES NOMINAL IN |
| Largest Step Diameter | 1.375 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.3150 INCHES NOMINAL IN |
| First End Keyway Depth | 0.140 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.390 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAY |
| Material | STEEL COMP 4130 |
| External Keyway Length | 1.300 INCHES NOMINAL SECOND END IN |
| External Keyway Length | 2.500 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.2530 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 |
|---|---|
| 15241000 ITEM 28 | C/1 Advisory reference — outside the item-of-supply concept Gulf Coast Holdings, Inc Dba Unidynamics |
| 15241000 | D/9 Drawing number reference only U.S. Government activity |
| 15242015-005 | 3/9 Design control — primary reference U.S. Government activity |
| 15242015 | D/9 Drawing number reference only U.S. Government activity |
| 15241000 ITEM 28 | 5/9 Secondary reference U.S. Government activity |
| 15242015-005 | C/1 Advisory reference — outside the item-of-supply concept Gulf Coast Holdings, Inc Dba Unidynamics |
NSN 3040-01-434-7245 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
6 possible matches (shared part number, not a government interchangeability claim): 3020-01-434-8047, 3010-01-434-9651, 3020-01-435-0074. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-434-7245: Surface Finish: 125.0 MICROINCHES; Step Quantity: 2; First End Diameter: 1.1245 INCHES NOMINAL IN; Second End Diameter: 1.3745 INCHES NOMINAL IN. 15 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.