The Worm Shaft, cataloged under National Stock Number 3040-00-385-7731, 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 25 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 | 3040-00-385-7731 |
| Primary Part Number | 7186995 |
| 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 | 33.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 6.376 INCHES NOMINAL IN |
| Worm Thread Lead | 0.6253 INCHES NOMINAL IN |
| Worm Pitch Diameter | 2.4886 INCHES NOMINAL IN |
| Worm Outside Diameter | 2.8866 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 1.3760 INCHES MINIMUM AND 1.3765 INCHES MAXIMUM FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 1.3760 INCHES MINIMUM AND 1.3765 INCHES MAXIMUM SECOND END FIRST PORTION IN |
| Unthreaded Section Keyway Depth | 0.136 INCHES MINIMUM AND 0.139 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Surface Treatment | OXIDE |
| Worm Thread Section Length | 3.750 INCHES NOMINAL IN |
| Worm Helix Angle | 4 DEG 34 MIN. |
| Material | STEEL |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | RIGHT-HAND |
| Unthreaded Section Keyway Width | 0.2465 INCHES MINIMUM AND 0.2485 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 1.187 INCHES NOMINAL SECOND END SECOND PORTION IN |
| Straight Unthreaded Length | 1.312 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Length | 1.687 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7186995 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3040-00-385-7731 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 3040-00-385-7731 has 1 manufacturer part number on file: 7186995 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 7186995: Shaft Location: BOTH ENDS OF WORM; FSC Application Data: LAUNCHER,762-MM ROCKET,TRUCK MOUNTED,XM289; Teeth Hardness Rating: 33.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM; Worm Body Length: 6.376 INCHES NOMINAL IN. 25 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 3040-00-385-7731 has DEMIL Code C. 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.