The Shaft,straight, cataloged under National Stock Number 3040-01-501-5680, 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 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-501-5680 |
| Primary Part Number | 596-7409665-1 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| First End Diameter | 2.9980 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN |
| Second End Diameter | 2.9980 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN |
| First End Hole Depth | 0.964 INCHES MINIMUM AND 0.975 INCHES MAXIMUM IN |
| First End Style | UNTHREADED CROSS DRILLED |
| Second End Keyway Width | 0.5060 INCHES MINIMUM AND 0.5080 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-A564,TYPE 630,CONDITION H1150 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Keyway Depth | 0.1790 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Hole Diameter | 0.1200 INCHES NOMINAL IN |
| Second End Style | FLAT KEYWAYS AND INTERNALLY THREADED |
| Material | STEEL CORROSION RESISTING |
| Second End Internal Thread Length | 3.450 INCHES NOMINAL IN |
| First End Distance From Hole Center to End | 1.380 INCHES NOMINAL IN |
| External Keyway Length | 3.262 INCHES MINIMUM AND 3.264 INCHES MAXIMUM SECOND END IN |
| 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 |
|---|---|
| 596-7409665-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| B831-2130-1 | 5/2 Secondary reference U.S. Government activity |
| 596-7409665 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-501-5680 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-501-5680 has 1 manufacturer part number on file: 596-7409665-1 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-501-6341, 3120-01-502-3315. Verify interchangeability with system specifications before substitution.
Key specifications for 596-7409665-1: Surface Finish: 32.0 MICROINCHES; First End Diameter: 2.9980 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN; Second End Diameter: 2.9980 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN; First End Hole Depth: 0.964 INCHES MINIMUM AND 0.975 INCHES MAXIMUM IN. 15 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.