The Shaft,shouldered, cataloged under National Stock Number 3040-00-301-7431, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-301-7431 |
| Primary Part Number | 8329421 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Finish | 8.0 MICROINCHES |
| FSC Application Data | HYDRAULIC PUMP,WINCH,VEHICLE MOUNTED |
| Step Quantity | 8 |
| First End Diameter | 1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN |
| Second End Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN |
| First End Hole Depth | 0.276 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.2500 INCHES MINIMUM AND 0.2580 INCHES MAXIMUM IN |
| Material Document and Classification | AISI OR SAE ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.9840 INCHES NOMINAL IN |
| Second End Hole Depth | 0.135 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0630 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 3.687 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND FLAT KEYWAY |
| Material | STEEL COMP 6150 |
| External Keyway Length | 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM SECOND END IN |
| External Keyway Length | 3.219 INCHES MINIMUM AND 3.281 INCHES MAXIMUM FIRST END IN |
| First End Keyway Width | 0.5000 INCHES MINIMUM AND 0.5040 INCHES MAXIMUM 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 |
|---|---|
| 8329421 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 1228D | 3/9 Design control — primary reference U.S. Government activity |
NSN 3040-00-301-7431 is a Shaft,shouldered, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-301-7431 has 1 manufacturer part number on file: 8329421 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8329421: Surface Finish: 8.0 MICROINCHES; FSC Application Data: HYDRAULIC PUMP,WINCH,VEHICLE MOUNTED; Step Quantity: 8; First End Diameter: 1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN. 20 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.