The Worm Shaft, cataloged under National Stock Number 3040-01-342-2491, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-342-2491 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Teeth Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 6.870 INCHES NOMINAL IN |
| Worm Outside Diameter | 2.270 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 1.499 INCHES NOMINAL BOTH ENDS IN |
| Unthreaded Section Keyway Depth | 3.500 INCHES NOMINAL FIRST END IN |
| Unthreaded Section Keyway Depth | 2.750 INCHES NOMINAL SECOND END IN |
| End Similarity | IDENTICAL |
| Material | STEEL |
| Worm Thread Direction | RIGHT-HAND |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 5.437 INCHES NOMINAL SECOND END IN |
| Straight Unthreaded Length | 6.312 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 |
| Reference | Meaning |
|---|---|
| 7400C-250 | D/9 Drawing number reference only U.S. Government activity |
| 7460C250 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-342-2491 is a Worm Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-342-2491: Shaft Location: BOTH ENDS OF WORM; Teeth Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Worm Body Length: 6.870 INCHES NOMINAL IN; Overall Length: 18.603 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.