The Worm Shaft, cataloged under National Stock Number 3040-00-421-1679, 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 | 3040-00-421-1679 |
| Primary Part Number | 10512780 |
| 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 |
| FSC Application Data | MOUNT,TELESCOPE |
| Teeth Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Worm Thread Lead | 0.125 INCHES NOMINAL IN |
| Thread Length | 0.261 INCHES NOMINAL FIRST END FIFTH PORTION IN |
| Worm Pitch Diameter | 0.436 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Worm Outside Diameter | 0.513 INCHES MINIMUM AND 0.518 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST END SIXTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.277 INCHES MINIMUM AND 0.279 INCHES MAXIMUM FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 0.310 INCHES MINIMUM AND 0.311 INCHES MAXIMUM SECOND END THIRD PORTION IN |
| Straight Unthreaded Section Diameter | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM SECOND END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 0.3146 INCHES MINIMUM AND 0.3150 INCHES MAXIMUM FIRST END FOURTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.330 INCHES MINIMUM AND 0.340 INCHES MAXIMUM FIRST END THIRD PORTION IN |
| End Similarity | NOT IDENTICAL |
| Shaft Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| Screw Thread Series Designator | UNF FIRST END |
| Surface Treatment | PASSIVATE |
| Worm Thread Section Length | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Shaft Thread Direction | RIGHT-HAND FIRST END FIFTH PORTION |
| Worm Helix Angle | 5 DEG 11 MIN |
| Material | STEEL CORROSION RESISTING |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | LEFT-HAND |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.1015 INCHES MINIMUM AND 0.1115 INCHES MAXIMUM FIRST END SIXTH 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 |
|---|---|
| 10512780 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 3040-00-421-1679 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 3040-00-421-1679 has 1 manufacturer part number on file: 10512780 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 10512780: Shaft Location: BOTH ENDS OF WORM; FSC Application Data: MOUNT,TELESCOPE; Teeth Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 31.0 ROCKWELL C MAXIMUM; Worm Body Length: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM 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.