The Shaft,straight, cataloged under National Stock Number 3040-01-221-5352, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-221-5352 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| First End Diameter | 1.5000 INCHES NOMINAL IN |
| Second End Diameter | 1.5000 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.3750 INCHES NOMINAL IN |
| Material Document and Classification | SAE1045 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.2110 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.1810 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAY |
| Material | STEEL COMP 1045 |
| External Keyway Length | 2.1800 INCHES NOMINAL FIRST END IN |
| External Keyway Length | 6.4400 INCHES NOMINAL SECOND END IN |
| First End Keyway Width | 0.3750 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 |
|---|---|
| 10694-2 | 3/9 Design control — primary reference U.S. Government activity |
| 10694-2 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 10694-2 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-221-5352 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-01-312-1874. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-221-5352: First End Diameter: 1.5000 INCHES NOMINAL IN; Second End Diameter: 1.5000 INCHES NOMINAL IN; First End Style: FLAT KEYWAY; Second End Keyway Width: 0.3750 INCHES NOMINAL IN. 13 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.