The Shaft,straight, cataloged under National Stock Number 3040-01-495-0409, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-495-0409 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| First End Diameter | 0.7500 INCHES NOMINAL IN |
| Second End Diameter | 0.7500 INCHES NOMINAL IN |
| Second End Step Length | 1.375 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | AISI/SAE 4142 ASSN STD SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| Material | STEEL COMP 4142 |
| Second End Width Across Flats | 0.625 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 |
|---|---|
| D420-6-8-396 ITEM12MOD5 | 3/2 Design control — primary reference U.S. Government activity |
| 14-22-2-1 REV C | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
| D420-6-8-396 IT | C/1 Advisory reference — outside the item-of-supply concept Ja Moody Llc |
| 420-6 REV C | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
| 102-218-080-420-002MOD5 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-495-0409 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-495-0412, 3040-01-495-4766, 3040-01-513-4633. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-495-0409: First End Diameter: 0.7500 INCHES NOMINAL IN; Second End Diameter: 0.7500 INCHES NOMINAL IN; Second End Step Length: 1.375 INCHES NOMINAL IN; First End Style: PLAIN. 9 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.