The Worm Shaft, cataloged under National Stock Number 3040-01-057-6546, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 29 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 | 3040-01-057-6546 |
| Primary Part Number | 11741740 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Bearing Quantity | 1 |
| Teeth Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Worm Thread Lead | 0.083 INCHES NOMINAL IN |
| Worm Pitch Diameter | 0.315 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Worm Outside Diameter | 0.365 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 0.187 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.188 INCHES NOMINAL FIRST END FOURTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.190 INCHES NOMINAL FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.220 INCHES NOMINAL FIRST END FIFTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.220 INCHES NOMINAL SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.249 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.268 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Unthreaded Section Keyway Depth | 0.034 INCHES NOMINAL FIRST END THIRD PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Bearing Type | BALL |
| Surface Treatment | PASSIVATE |
| Worm Thread Section Length | 0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Worm Helix Angle | 4 DEG 47 MIN |
| Material | STEEL CORROSION RESISTING |
| Worm Thread Quantity | 7 |
| Worm Thread Direction | LEFT-HAND |
| Unthreaded Section Keyway Width | 0.0700 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Bearing Diameter | 0.562 INCHES NOMINAL IN |
| Straight Unthreaded Length | 0.090 INCHES NOMINAL FIRST END THIRD PORTION IN |
| Straight Unthreaded Length | 0.160 INCHES NOMINAL FIRST END FIFTH 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 |
| Part Number | Manufacturer |
|---|---|
| 11741740 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 3040-01-057-6546 is a Worm Shaft, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-057-6546 has 1 manufacturer part number on file: 11741740 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 11741740: Shaft Location: BOTH ENDS OF WORM; Bearing Quantity: 1; Teeth Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Worm Thread Lead: 0.083 INCHES NOMINAL IN. 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.