The Shaft,shouldered, cataloged under National Stock Number 3040-01-125-0432, 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 18 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 | 3040-01-125-0432 |
| Primary Part Number | 7979030 |
| 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 | 0.9980 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Second End Diameter | 0.8110 INCHES MINIMUM AND 0.8130 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| First End Style | UNTHREADED CROSS DRILLED |
| Second End Keyway Width | 0.1350 INCHES MINIMUM AND 0.1400 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-633 FED SPEC ALL MATERIAL RESPONSES |
| Second End Groove Diameter | 0.7590 INCHES MINIMUM AND 0.7650 INCHES MAXIMUM IN |
| Second End Keyway Depth | 0.221 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Hole Diameter | 0.3910 INCHES MINIMUM AND 0.4060 INCHES MAXIMUM IN |
| Second End Groove Width | 0.0460 INCHES MINIMUM AND 0.0490 INCHES MAXIMUM IN |
| Second End Distance From End to Groove | 0.133 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN |
| Second End Style | CIRCULAR GROOVED AND FLAT KEYWAY |
| Material | STEEL COMP 1035 OR STEEL COMP 1038 OR STEEL COMP 1040 OR STEEL COMP 1041 OR STEEL COMP 1042 OR STEEL COMP 1043 OR STEEL COMP 1045 OR STEEL COMP 1137 OR STEEL COMP 1139 OR STEEL COMP 1140 OR STEEL COMP 1141 OR STEEL COMP 1144 |
| First End Distance From Hole Center to End | 1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN |
| External Keyway Length | 5.062 INCHES NOMINAL SECOND END 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 |
|---|---|
| 7979030 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-125-0432 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 3040-01-125-0432 has 1 manufacturer part number on file: 7979030 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7979030: Surface Finish: 63.0 MICROINCHES; Step Quantity: 2; First End Diameter: 0.9980 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN; Second End Diameter: 0.8110 INCHES MINIMUM AND 0.8130 INCHES MAXIMUM IN. 18 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.