The Shaft,straight, cataloged under National Stock Number 3040-01-345-3952, 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17 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-345-3952 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| First End Diameter | 0.4320 INCHES MINIMUM AND 0.4340 INCHES MAXIMUM IN |
| First End Distance From Keyway Center to End | 0.500 INCHES NOMINAL IN |
| Second End Diameter | 0.3130 INCHES MINIMUM AND 0.3180 INCHES MAXIMUM IN |
| Second End Angle Between Keyways | 45.0 DEGREES NOMINAL |
| Second End Distance From Keyway Center to End | 2.531 INCHES NOMINAL IN |
| First End Style | TWO WOODRUFF KEYWAYS |
| Second End Keyway Width | 0.1250 INCHES NOMINAL IN |
| Second End Distance Between Keyway Centers | 2.0000 INCHES NOMINAL IN |
| First End Distance Between Keyway Centers | 1.8120 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | TWO WOODRUFF KEYWAYS |
| First End Angle Between Keyways | 45.0 DEGREES NOMINAL |
| Material | STEEL COMP 416 |
| External Keyway Length | 0.438 INCHES NOMINAL FIRST END IN |
| External Keyway Length | 0.438 INCHES NOMINAL SECOND END IN |
| First End Keyway Width | 0.1250 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 |
|---|---|
| 204233 | 5/9 Secondary reference U.S. Government activity |
| 204233 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 204233 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 204233-MP | D/9 Drawing number reference only U.S. Government activity |
| 204233 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-345-3952 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): 6680-01-521-1401. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-345-3952: Surface Finish: 32.0 MICROINCHES; First End Diameter: 0.4320 INCHES MINIMUM AND 0.4340 INCHES MAXIMUM IN; First End Distance From Keyway Center to End: 0.500 INCHES NOMINAL IN; Second End Diameter: 0.3130 INCHES MINIMUM AND 0.3180 INCHES MAXIMUM 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.