The Shaft,shouldered, cataloged under National Stock Number 3040-01-313-8753, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-313-8753 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End External Thread Length | 0.500 INCHES NOMINAL IN |
| Step Quantity | 11 |
| First End Diameter | 0.9340 INCHES NOMINAL IN |
| Second End Diameter | 1.9670 INCHES NOMINAL IN |
| Largest Step Diameter | 1.967 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED |
| Second End Keyway Width | 0.2490 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.094 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.375 INCHES NOMINAL IN |
| Second End Groove Width | 0.1250 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.500 INCHES NOMINAL IN |
| First End Groove Diameter | 0.5300 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED FLAT KEYWAY AND EXTERNALLY THREADED |
| Material | STEEL |
| First End Groove Width | 0.1562 INCHES NOMINAL IN |
| External Keyway Length | 0.781 INCHES NOMINAL SECOND END 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 |
|---|---|
| 26M68-306-12 | 3/2 Design control — primary reference U.S. Government activity |
| 26M68-306 | D/9 Drawing number reference only U.S. Government activity |
| 26M68-306-12 | 5/9 Secondary reference At and T Document Development Organization |
NSN 3040-01-313-8753 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-314-5054, 3040-01-315-5940. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-313-8753: Second End External Thread Length: 0.500 INCHES NOMINAL IN; Step Quantity: 11; First End Diameter: 0.9340 INCHES NOMINAL IN; Second End Diameter: 1.9670 INCHES NOMINAL IN. 17 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.