The Worm Shaft, cataloged under National Stock Number 3040-01-303-7501, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-303-7501 |
| Primary Part Number | 2540040 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Teeth Hardness Rating | 48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 1.847 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN |
| Worm Thread Lead | 0.1963 INCHES NOMINAL IN |
| Worm Pitch Diameter | 0.6250 INCHES NOMINAL IN |
| Worm Outside Diameter | 0.749 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 0.2400 INCHES NOMINAL FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.3123 INCHES NOMINAL SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.3747 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.3747 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Unthreaded Section Pin Hole Diameter | 0.0634 INCHES MINIMUM AND 0.0636 INCHES MAXIMUM SECOND END IN |
| End Similarity | NOT IDENTICAL |
| Surface Treatment | ANODIZE |
| Worm Thread Section Length | 1.850 INCHES MINIMUM AND 1.870 INCHES MAXIMUM IN |
| Worm Helix Angle | 5 DEG 43 MIN |
| Material | STEEL |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | RIGHT-HAND |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.390 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Straight Unthreaded Length | 0.500 INCHES NOMINAL SECOND END SECOND PORTION IN |
| Straight Unthreaded Length | 0.630 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Length | 0.770 INCHES NOMINAL FIRST END SECOND 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 |
| Part Number | Manufacturer |
|---|---|
| 2540040 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3040-01-303-7501 is a Worm Shaft, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-303-7501 has 1 manufacturer part number on file: 2540040 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2540040: Shaft Location: BOTH ENDS OF WORM; Teeth Hardness Rating: 48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Worm Body Length: 1.847 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN; Worm Thread Lead: 0.1963 INCHES NOMINAL IN. 24 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.