The Worm Shaft, cataloged under National Stock Number 3040-00-776-8063, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is General Motors Corp. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-776-8063 |
| Primary Part Number | 6762340 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| FSC Application Data | ADJUSTMENT MECHANIS,TRANSMISSION,COMBAT TANK |
| Section Shape | SQUARE EITHER END SEVENTH PORTION |
| Teeth Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 1.875 INCHES NOMINAL IN |
| Worm Thread Lead | 0.400 INCHES NOMINAL IN |
| Thread Length | 1.125 INCHES NOMINAL EITHER END SIXTH PORTION IN |
| Worm Pitch Diameter | 0.625 INCHES NOMINAL IN |
| Worm Outside Diameter | 0.737 INCHES MINIMUM AND 0.747 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 0.435 INCHES MINIMUM AND 0.436 INCHES MAXIMUM EITHER END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.609 INCHES MINIMUM AND 0.619 INCHES MAXIMUM EITHER END FOURTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM EITHER END FIFTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.737 INCHES MINIMUM AND 0.747 INCHES MAXIMUM EITHER END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 1.000 INCHES MINIMUM AND 1.060 INCHES MAXIMUM EITHER END THIRD PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Screw Thread Series Designator | UNF EITHER END SIXTH PORTION |
| Worm Thread Section Length | 1.750 INCHES NOMINAL IN |
| Shaft Thread Direction | RIGHT-HAND EITHER END SIXTH PORTION |
| Worm Helix Angle | 20 DEG 4 MIN |
| Material | STEEL |
| Worm Thread Quantity | 8 |
| Worm Thread Direction | RIGHT-HAND |
| Worm Pressure Angle in Deg | 20.000 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.125 INCHES NOMINAL EITHER END THIRD PORTION IN |
| Straight Unthreaded Length | 0.450 INCHES NOMINAL EITHER END FIRST PORTION IN |
| Straight Unthreaded Length | 0.625 INCHES NOMINAL EITHER END FIFTH PORTION IN |
| Straight Unthreaded Length | 1.988 INCHES NOMINAL EITHER 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 |
NSN 3040-00-776-8063 is a Worm Shaft, manufactured by General Motors Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-776-8063 has 2 manufacturer part numbers on file: 7768063 (U S Army Tank Automotive Command Amsta-Im-Mm), 6762340 (General Motors Corp).
Key specifications for 6762340: Shaft Location: BOTH ENDS OF WORM; FSC Application Data: ADJUSTMENT MECHANIS,TRANSMISSION,COMBAT TANK; Section Shape: SQUARE EITHER END SEVENTH PORTION; Teeth Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. 29 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.