The Worm Shaft, cataloged under National Stock Number 3040-01-091-1982, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 19 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 | 3040-01-091-1982 |
| Primary Part Number | 7954478-2 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Teeth Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM |
| Worm Thread Lead | 0.875 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-13048, 8642, 4140 OR 8740 MIL SPEC ALL MATERIAL RESPONSES |
| Worm Pitch Diameter | 3.216 INCHES NOMINAL IN |
| Worm Outside Diameter | 3.774 INCHES MINIMUM AND 3.776 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 1.500 INCHES NOMINAL SECOND END FIFTH PORTION IN |
| Straight Unthreaded Section Diameter | 1.767 INCHES NOMINAL SECOND END FOURTH PORTION IN |
| Unthreaded Section Keyway Depth | 0.218 INCHES NOMINAL FIRST END FIFTH PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 17.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Worm Thread Section Length | 3.750 INCHES NOMINAL IN |
| Worm Helix Angle | 4 DEG 57 MIN |
| Material | STEEL COMP 4140 OR STEEL COMP 8642 OR STEEL COMP 8740 |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | LEFT-HAND |
| Unthreaded Section Keyway Width | 0.3720 INCHES NOMINAL FIRST END FIFTH PORTION IN |
| Worm Pressure Angle in Deg | 27.500 |
| 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 |
|---|---|
| 7954478-2 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-091-1982 is a Worm Shaft, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-091-1982 has 1 manufacturer part number on file: 7954478-2 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7954478-2: Shaft Location: BOTH ENDS OF WORM; Teeth Hardness Rating: 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM; Worm Thread Lead: 0.875 INCHES NOMINAL IN; Material Document and Classification: MIL-S-13048, 8642, 4140 OR 8740 MIL SPEC ALL MATERIAL RESPONSES. 19 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.