The Shaft,straight, cataloged under National Stock Number 3040-01-496-0574, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-496-0574 |
| Primary Part Number | 581-6726671-13 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| First End Diameter | 3.2450 INCHES MINIMUM AND 3.2470 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 3.2450 INCHES MINIMUM AND 3.2470 INCHES MAXIMUM IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | QQ-N-286, FORM 2 NATIONAL SPEC ALL MATERIAL RESPONSES |
| First End Spline Length | 30.870 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 2.8700 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY 502 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 581-6726671-13 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 581-6726671 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-496-0574 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-496-0574 has 1 manufacturer part number on file: 581-6726671-13 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 3040-01-496-0739, 3120-01-496-3662, 3120-01-496-3663. Verify interchangeability with system specifications before substitution.
Key specifications for 581-6726671-13: Surface Finish: 125.0 MICROINCHES; First End Diameter: 3.2450 INCHES MINIMUM AND 3.2470 INCHES MAXIMUM IN; First End Spline Major Diameter: 3.2450 INCHES MINIMUM AND 3.2470 INCHES MAXIMUM IN; First End Style: SPLINED (STRAIGHT). 10 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.