The Shaft,shouldered, cataloged under National Stock Number 3040-01-503-6400, 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 21 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-503-6400 |
| Primary Part Number | 596-7410507-16 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES |
| Second End External Thread Length | 1.380 INCHES NOMINAL IN |
| Step Quantity | 11 |
| First End Diameter | 1.4960 INCHES MINIMUM AND 1.4980 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 1.4960 INCHES MINIMUM AND 1.4980 INCHES MAXIMUM IN |
| Second End Diameter | 1.8760 INCHES MINIMUM AND 1.8765 INCHES MAXIMUM IN |
| Largest Step Diameter | 2.500 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Second End Keyway Width | 0.4990 INCHES MINIMUM AND 0.5010 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-N-286,FORM 2,COND:ANEALED & AGE HARDENED, FINISH B FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 1.6400 INCHES NOMINAL IN |
| First End Spline Length | 3.000 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.2910 INCHES MINIMUM AND 0.2965 INCHES MAXIMUM IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.1200 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 1.380 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED FLAT KEYWAY AND EXTERNALLY THREADED |
| First End Spline Minor Diameter | 1.2740 INCHES MINIMUM AND 1.2840 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY K-500 |
| External Keyway Length | 1.943 INCHES NOMINAL 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 |
|---|---|
| 596-7410332-59 | Naval Sea Systems Command (USA) |
| 596-7410507-16 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| B434-5410-59 | 5/2 Secondary reference U.S. Government activity |
| 596-7410332 | D/9 Drawing number reference only Naval Sea Systems Command |
| B434-5412-16 | 5/2 Secondary reference U.S. Government activity |
| 596-7410507 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-503-6400 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-503-6400 has 2 manufacturer part numbers on file: 596-7410332-59 (Naval Sea Systems Command), 596-7410507-16 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-503-7548. Verify interchangeability with system specifications before substitution.
Key specifications for 596-7410507-16: Surface Finish: 16.0 MICROINCHES; Second End External Thread Length: 1.380 INCHES NOMINAL IN; Step Quantity: 11; First End Diameter: 1.4960 INCHES MINIMUM AND 1.4980 INCHES MAXIMUM IN. 21 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.