The Shaft,shouldered, cataloged under National Stock Number 3040-01-275-4229, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-275-4229 |
| Primary Part Number | 518-4457076 PART 14L1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| Second End External Thread Length | 13.9375 INCHES NOMINAL IN |
| Step Quantity | 3 |
| First End Diameter | 4.7500 INCHES NOMINAL IN |
| Second End Diameter | 4.7500 INCHES NOMINAL IN |
| Largest Step Diameter | 5.2475 INCHES NOMINAL IN |
| First End External Thread Length | 3.375 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-N-286,CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | NICKEL ALLOY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 518-4457076 PART 14L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2010-120 PART 14L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 518-4457076 PART 14 | 5/1 Secondary reference U.S. Government activity |
| 2010-120 PART 14 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 518-4457076 | D/9 Drawing number reference only U.S. Government activity |
| 2010-120 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3040-01-275-4229 is a Shaft,shouldered, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-275-4229 has 2 manufacturer part numbers on file: 518-4457076 PART 14L1 (Naval Inventory Control Point Mechanicsburg), 2010-120 PART 14L1 (Naval Inventory Control Point Mechanicsburg).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-275-7432, 3040-01-276-1449. Verify interchangeability with system specifications before substitution.
Key specifications for 518-4457076 PART 14L1: Surface Finish: 32.0 MICROINCHES; Second End External Thread Length: 13.9375 INCHES NOMINAL IN; Step Quantity: 3; First End Diameter: 4.7500 INCHES NOMINAL IN. 14 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.
NSN 3040-01-275-4229 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.