The Shaft,straight, cataloged under National Stock Number 3040-01-505-5889, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-505-5889 |
| Primary Part Number | 596-7409702-26 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| First End Diameter | 0.6250 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.6220 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM IN |
| Second End Diameter | 0.6250 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.5220 INCHES MINIMUM AND 0.5320 INCHES MAXIMUM IN |
| First End Style | SPLINED (STRAIGHT) |
| Second End Spline Major Diameter | 0.6220 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM-A564, TYPE-630, CONDITION-H1025 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Spline Length | 1.040 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 10 |
| Second End Style | SPLINED (STRAIGHT) |
| First End Spline Minor Diameter | 0.5220 INCHES MINIMUM AND 0.5320 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| Second End Spline Length | 2.250 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 |
| Part Number | Manufacturer |
|---|---|
| 596-7409704-14 | Naval Sea Systems Command (USA) |
| 596-7409702-26 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| B831-4300-14 | 5/2 Secondary reference U.S. Government activity |
| B831-4200-26 | 5/2 Secondary reference U.S. Government activity |
| 7409702 | D/9 Drawing number reference only Naval Sea Systems Command |
| 7409704 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-505-5889 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-505-5889 has 2 manufacturer part numbers on file: 596-7409704-14 (Naval Sea Systems Command), 596-7409702-26 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 2090-01-506-5986. Verify interchangeability with system specifications before substitution.
Key specifications for 596-7409702-26: First End Diameter: 0.6250 INCHES NOMINAL IN; First End Spline Major Diameter: 0.6220 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM IN; Second End Diameter: 0.6250 INCHES NOMINAL IN; Second End Spline Minor Diameter: 0.5220 INCHES MINIMUM AND 0.5320 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.