The Shaft,shouldered, cataloged under National Stock Number 3040-00-888-3779, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-00-888-3779 |
| Primary Part Number | 7974245 |
| 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 | 63.0 MICROINCHES |
| Step Quantity | 2 |
| First End Diameter | 1.2475 INCHES MINIMUM AND 1.2485 INCHES MAXIMUM IN |
| Second End Diameter | 0.9895 INCHES NOMINAL IN |
| Largest Step Diameter | 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN |
| Second End Spline Minor Diameter | 0.8810 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED |
| Second End Spline Major Diameter | 0.9895 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-633 FED SPEC ALL MATERIAL RESPONSES |
| Second End Groove Diameter | 0.7340 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.292 INCHES NOMINAL IN |
| Second End Spline Quantity | 20 |
| Second End Groove Width | 0.4060 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.391 INCHES NOMINAL IN |
| First End Groove Diameter | 1.0020 INCHES MINIMUM AND 1.0100 INCHES MAXIMUM IN |
| Second End Style | CIRCULAR GROOVED AND SPLINED (STRAIGHT) |
| Material | STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 |
| First End Groove Width | 0.1880 INCHES NOMINAL IN |
| Second End Spline Length | 1.156 INCHES NOMINAL 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 |
|---|---|
| 7974245 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 604KC227 | 5/9 Secondary reference Mack Trucks Inc Parts Opn |
NSN 3040-00-888-3779 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 3040-00-888-3779 has 1 manufacturer part number on file: 7974245 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7974245: Surface Finish: 63.0 MICROINCHES; Step Quantity: 2; First End Diameter: 1.2475 INCHES MINIMUM AND 1.2485 INCHES MAXIMUM IN; Second End Diameter: 0.9895 INCHES NOMINAL 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.