The Shaft,shouldered, cataloged under National Stock Number 3040-01-151-5639, 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16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-151-5639 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| First End Width Across Flats | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Step Quantity | 2 |
| First End Diameter | 1.5000 INCHES NOMINAL IN |
| First End Step Length | 1.500 INCHES NOMINAL IN |
| Second End Diameter | 0.7480 INCHES MINIMUM AND 0.7520 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.500 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 0.708 INCHES NOMINAL IN |
| First End Style | SQUARE (ROUND CORNERS) |
| Second End Keyway Width | 0.1880 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763,COND B FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Keyway Depth | 0.114 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | INDENTED FLAT KEYWAY |
| Material | STEEL COMP 304 |
| External Keyway Length | 1.104 INCHES NOMINAL SECOND END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 87832-1639 ITEM 29 | 3/2 Design control — primary reference U.S. Government activity |
| 709-4684910 | D/9 Drawing number reference only U.S. Government activity |
| 87832-1639 | D/9 Drawing number reference only U.S. Government activity |
| 709-4684910 ITEM 29 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-151-5639 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): 3040-01-151-6327, 3040-01-290-4482. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-151-5639: Surface Finish: 63.0 MICROINCHES; First End Width Across Flats: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Step Quantity: 2; First End Diameter: 1.5000 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.
NSN 3040-01-151-5639 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.