The Worm Shaft, cataloged under National Stock Number 3040-00-385-7808, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 28 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 | 3040-00-385-7808 |
| Primary Part Number | 7189604 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| FSC Application Data | LAUNCHER,762-MM ROCKET,TRUCK MOUNTED,XM289 |
| Teeth Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 3.563 INCHES NOMINAL IN |
| Worm Thread Lead | 0.625 INCHES NOMINAL IN |
| Thread Length | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST END THIRD PORTION IN |
| Thread Length | 0.948 INCHES NOMINAL SECOND END FOURTH PORTION IN |
| Spline Major Diameter | 1.116 INCHES MINIMUM AND 1.117 INCHES MAXIMUM SECOND END THIRD PORTION IN |
| Worm Pitch Diameter | 2.500 INCHES NOMINAL IN |
| Worm Outside Diameter | 2.8975 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 1.1810 INCHES MINIMUM AND 1.1814 INCHES MAXIMUM FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 1.1810 INCHES MINIMUM AND 1.1814 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 1.438 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Unthreaded Section Keyway Depth | 0.094 INCHES NOMINAL FIRST END SECOND PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Keyway Width | 0.188 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Screw Thread Series Designator | UNF SECOND END FOURTH PORTION |
| Screw Thread Series Designator | UNS FIRST END THIRD PORTION |
| Surface Treatment | PHOSPHATE |
| Worm Thread Section Length | 3.188 INCHES NOMINAL IN |
| Shaft Thread Direction | RIGHT-HAND FIRST END THIRD PORTION |
| Shaft Thread Direction | RIGHT-HAND SECOND END FOURTH PORTION |
| Worm Helix Angle | 4 DEG 33 MIN. |
| Material | STEEL |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | LEFT-HAND |
| Unthreaded Section Keyway Width | 0.1880 INCHES NOMINAL FIRST END SECOND PORTION IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7189604 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3040-00-385-7808 is a Worm Shaft, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-385-7808 has 1 manufacturer part number on file: 7189604 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 7189604: Shaft Location: BOTH ENDS OF WORM; FSC Application Data: LAUNCHER,762-MM ROCKET,TRUCK MOUNTED,XM289; Teeth Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Worm Body Length: 3.563 INCHES NOMINAL IN. 28 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.
NSN 3040-00-385-7808 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.