The Shaft,shouldered, cataloged under National Stock Number 3040-01-422-7857, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-422-7857 |
| Primary Part Number | 12373356 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| First End Width Across Flats | 0.4960 INCHES NOMINAL IN |
| Second End External Thread Length | 0.7350 INCHES NOMINAL IN |
| Step Quantity | 12 |
| First End Diameter | 0.7500 INCHES NOMINAL IN |
| First End Step Length | 0.6500 INCHES NOMINAL IN |
| Second End Diameter | 0.5000 INCHES NOMINAL IN |
| Largest Step Diameter | 0.960 INCHES NOMINAL IN |
| First End Style | HEXAGONAL |
| Material Document and Classification | ASTM-A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A331 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.4290 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0900 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.7350 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Material | STEEL |
| 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 |
|---|---|
| 12373356 | Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service (USA) |
| 12373356 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 12373356 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 3040-01-422-7857 is a Shaft,shouldered, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-422-7857 has 2 manufacturer part numbers on file: 12373356 (Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service), 12373356 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 12373356: First End Width Across Flats: 0.4960 INCHES NOMINAL IN; Second End External Thread Length: 0.7350 INCHES NOMINAL IN; Step Quantity: 12; First End Diameter: 0.7500 INCHES NOMINAL IN. 15 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.