The Worm Shaft, cataloged under National Stock Number 3040-01-050-9520, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-050-9520 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Worm Body Length | 3.620 INCHES MINIMUM AND 3.625 INCHES MAXIMUM IN |
| Material Document and Classification | AISI 4140 ASSN STD SINGLE MATERIAL RESPONSE |
| Worm Pitch Diameter | 1.115 INCHES NOMINAL IN |
| Worm Outside Diameter | 1.236 INCHES MINIMUM AND 1.241 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 34.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Worm Thread Section Length | 1.240 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN |
| Worm Helix Angle | 6 DEG 31 MIN |
| Material | STEEL COMP 4140 |
| Worm Thread Quantity | 2 |
| 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 |
| Reference | Meaning |
|---|---|
| 9993CC476 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-050-9520 is a Worm Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-050-9520: Shaft Location: BOTH ENDS OF WORM; Worm Body Length: 3.620 INCHES MINIMUM AND 3.625 INCHES MAXIMUM IN; Material Document and Classification: AISI 4140 ASSN STD SINGLE MATERIAL RESPONSE; Overall Length: 7.440 INCHES NOMINAL IN. 14 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.