The Worm Shaft, cataloged under National Stock Number 3040-01-049-1020, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-049-1020 |
| Primary Part Number | 2580175 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Teeth Hardness Rating | 56.0 ROCKWELL C NOMINAL |
| Worm Thread Lead | 0.473 INCHES NOMINAL IN |
| Serrated Section Length | 1.844 INCHES NOMINAL SECOND END IN |
| Worm Pitch Diameter | 0.937 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 0.897 INCHES NOMINAL FIRST END IN |
| Unthreaded Section Pin Hole Diameter | 0.1890 INCHES NOMINAL FIRST END IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 56.0 ROCKWELL C NOMINAL LOCATION NOT OTHERWISE SPECIFIED |
| Serration Quantity | 45 SECOND END |
| Surface Treatment | PHOSPHATE |
| Worm Thread Section Length | 5.471 INCHES NOMINAL IN |
| Serration Major Diameter | 0.958 INCHES NOMINAL SECOND END IN |
| Material | STEEL |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | RIGHT-HAND |
| Serration Minor Diameter | 0.916 INCHES NOMINAL SECOND END IN |
| Worm Pressure Angle in Deg | 45.000 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.875 INCHES NOMINAL FIRST 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 |
|---|---|
| 2580175 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2580175 | 3/2 Design control — primary reference U.S. Government activity |
| 2580175 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2580175 | 5/9 Secondary reference Ball a C Co |
NSN 3040-01-049-1020 is a Worm Shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-049-1020 has 1 manufacturer part number on file: 2580175 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-278-1805. Verify interchangeability with system specifications before substitution.
Key specifications for 2580175: Shaft Location: BOTH ENDS OF WORM; Teeth Hardness Rating: 56.0 ROCKWELL C NOMINAL; Worm Thread Lead: 0.473 INCHES NOMINAL IN; Serrated Section Length: 1.844 INCHES NOMINAL SECOND END IN. 20 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.