The Shaft,shouldered, cataloged under National Stock Number 3040-01-191-8372, 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16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-191-8372 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End External Thread Length | 1.500 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 0.9980 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.9970 INCHES NOMINAL IN |
| Second End Diameter | 2.2500 INCHES NOMINAL IN |
| Largest Step Diameter | 2.250 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 3.000 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY AND INTERNALLY THREADED |
| First End Spline Minor Diameter | 0.8390 INCHES NOMINAL IN |
| Material | COPPER ALLOY 632 |
| Second End Internal Thread Length | 2.260 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 |
|---|---|
| 87774-3606 | D/9 Drawing number reference only U.S. Government activity |
| 300-4684425 | D/9 Drawing number reference only U.S. Government activity |
| 87774-3606 ITEM 6 | 3/2 Design control — primary reference U.S. Government activity |
| 300-4684425ITEM6 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-191-8372 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-244-8452, 3040-01-244-8455, 3040-01-245-1532. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-191-8372: Surface Finish: 125.0 MICROINCHES; Second End External Thread Length: 1.500 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 0.9980 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.