The Shaft,shouldered, cataloged under National Stock Number 3040-01-375-7777, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Wilson's Machine Products, Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-375-7777 |
| Primary Part Number | 66910644-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Wilson's Machine Products, Inc |
| Status | ACTIVE |
| Step Quantity | 7 |
| First End Diameter | 0.2500 INCHES NOMINAL IN |
| Second End Diameter | 0.2500 INCHES NOMINAL IN |
| Second End Step Length | 0.3800 INCHES NOMINAL IN |
| Largest Step Diameter | 0.500 INCHES NOMINAL IN |
| First End External Thread Length | 0.860 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| End Similarity | NOT IDENTICAL |
| Second End Style | HEXAGONAL |
| Material | STEEL |
| Second End Width Across Flats | 0.2500 INCHES NOMINAL 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 |
|---|---|
| 66910644-1 | Northrop Grumman Systems Corporation (USA) |
| 66910644-1 PRIMARY | Wilson's Machine Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 66910644 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| 66910644-1 | 5/9 Secondary reference Elbit Systems Electro-Optics-Elopltd Dba Mergers 1999 Ltd - Formerly |
| 66910644-1 | 5/9 Secondary reference Elop Electro Optical Industries Ltd |
NSN 3040-01-375-7777 is a Shaft,shouldered, manufactured by Wilson's Machine Products, Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-375-7777 has 2 manufacturer part numbers on file: 66910644-1 (Northrop Grumman Systems Corporation), 66910644-1 (Wilson's Machine Products, Inc).
Key specifications for 66910644-1: Step Quantity: 7; First End Diameter: 0.2500 INCHES NOMINAL IN; Second End Diameter: 0.2500 INCHES NOMINAL IN; Second End Step Length: 0.3800 INCHES NOMINAL IN. 11 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 3040-01-375-7777 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.