The Worm Shaft, cataloged under National Stock Number 3040-01-446-6442, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-446-6442 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Teeth Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 5.2500 INCHES NOMINAL IN |
| Worm Thread Lead | 0.900 INCHES NOMINAL IN |
| Worm Pitch Diameter | 3.1450 INCHES NOMINAL IN |
| Worm Outside Diameter | 3.7740 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 1.5000 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 1.9950 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 2.0040 INCHES NOMINAL SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 2.1250 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Straight Unthreaded Section Diameter | 2.1250 INCHES NOMINAL SECOND END FOURTH PORTION IN |
| Straight Unthreaded Section Diameter | 3.000 INCHES NOMINAL FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 3.0000 INCHES NOMINAL SECOND END THIRD PORTION IN |
| Unthreaded Section Keyway Depth | 0.1880 INCHES NOMINAL SECOND END FIRST PORTION IN |
| End Similarity | IDENTICAL |
| Shaft Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Worm Helix Angle | 5 DEG 44 MIN |
| Material | STEEL |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | RIGHT-HAND |
| Unthreaded Section Keyway Width | 0.2750 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Worm Pressure Angle in Deg | 20.000 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.5000 INCHES NOMINAL FIRST END SECOND PORTION IN |
| Straight Unthreaded Length | 0.5000 INCHES NOMINAL SECOND END THIRD PORTION IN |
| Straight Unthreaded Length | 1.2500 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Straight Unthreaded Length | 1.2500 INCHES NOMINAL SECOND END FOURTH PORTION IN |
| Straight Unthreaded Length | 1.7810 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4403535 | D/9 Drawing number reference only U.S. Government activity |
| 123-4403535 PAR | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4403536 | D/9 Drawing number reference only U.S. Government activity |
| 1502-79 FN 11 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 123-4403536 PART 5 | 3/2 Design control — primary reference U.S. Government activity |
| 1502-80 FN 5 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 123-4403535 PART 11 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-446-6442 is a Worm Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-446-7620, 3020-01-446-7786, 3020-01-446-7820. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-446-6442: Shaft Location: BOTH ENDS OF WORM; Teeth Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM; Worm Body Length: 5.2500 INCHES NOMINAL IN; Worm Thread Lead: 0.900 INCHES NOMINAL IN. 28 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.