The Worm Shaft, cataloged under National Stock Number 3040-01-505-0529, 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 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-505-0529 |
| Primary Part Number | 7410251-9 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shaft Location | ONE END OF WORM |
| Section Shape | SQUARE FIRST END FIRST PORTION |
| Worm Body Length | 21.070 INCHES NOMINAL IN |
| Worm Thread Lead | 0.166 INCHES NOMINAL IN |
| Worm Pitch Diameter | 1.1338 INCHES MINIMUM AND 1.1578 INCHES MAXIMUM IN |
| Worm Outside Diameter | 1.2417 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM IN |
| Worm Thread Section Length | 12.670 INCHES NOMINAL IN |
| Worm Helix Angle | 2.4302 DEG |
| Material | COPPER ALLOY |
| Worm Thread Quantity | 76 |
| Worm Thread Direction | RIGHT-HAND |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| 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 |
|---|---|
| 7410251-9 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 596-7410251-9 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| B831-9521-9 | 5/2 Secondary reference U.S. Government activity |
| 7410251 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-505-0529 is a Worm Shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-505-0529 has 1 manufacturer part number on file: 7410251-9 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3010-01-505-1559, 3010-01-505-1565. Verify interchangeability with system specifications before substitution.
Key specifications for 7410251-9: Shaft Location: ONE END OF WORM; Section Shape: SQUARE FIRST END FIRST PORTION; Worm Body Length: 21.070 INCHES NOMINAL IN; Worm Thread Lead: 0.166 INCHES NOMINAL IN. 13 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.