The Shaft,shouldered, cataloged under National Stock Number 3040-01-203-4802, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-203-4802 |
| Primary Part Number | 4457023 PIECE 137 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Second End External Thread Length | 0.4375 INCHES NOMINAL IN |
| Step Quantity | 7 |
| First End Diameter | 0.7090 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.7090 INCHES NOMINAL IN |
| Second End Diameter | 0.5833 INCHES NOMINAL IN |
| Largest Step Diameter | 1.187 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | MIL-S-1222F MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 1.500 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| First End Spline Minor Diameter | 0.7080 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 501-4457023 PIECE 137 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 4457023 PIECE 137 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 6503-86 PIECE 137 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 501-4457023 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4496110 | D/9 Drawing number reference only U.S. Government activity |
| 4457023 | D/9 Drawing number reference only U.S. Government activity |
| 6503-86 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 3040-01-203-4802 is a Shaft,shouldered, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-203-4802 has 3 manufacturer part numbers on file: 501-4457023 PIECE 137 (Huntington Ingalls Inc Div Newport News Shipbuilding), 4457023 PIECE 137 (Huntington Ingalls Inc Div Newport News Shipbuilding), 6503-86 PIECE 137 (Huntington Ingalls Inc Div Newport News Shipbuilding).
10 possible matches (shared part number, not a government interchangeability claim): 3040-01-203-4803, 3120-01-235-4644, 4820-01-235-9073. Verify interchangeability with system specifications before substitution.
Key specifications for 4457023 PIECE 137: Second End External Thread Length: 0.4375 INCHES NOMINAL IN; Step Quantity: 7; First End Diameter: 0.7090 INCHES NOMINAL IN; First End Spline Major Diameter: 0.7090 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.
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.