The Shaft,shouldered, cataloged under National Stock Number 3040-01-254-4539, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Spec Tool Company. Government technical data includes 17 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 | 3040-01-254-4539 |
| Primary Part Number | STC90232-3 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Spec Tool Company |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 1 |
| First End Diameter | 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Diameter | 0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.249 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| First End Style | CIRCULAR GROOVED |
| Supplementary Features | GEARBOX SHAFT APPL |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.9520 INCHES MINIMUM AND 0.9580 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.1110 INCHES MINIMUM AND 0.1140 INCHES MAXIMUM IN |
| Second End Groove Width | 0.0460 INCHES MINIMUM AND 0.0490 INCHES MAXIMUM IN |
| Second End Distance From End to Groove | 0.0460 INCHES MINIMUM AND 0.0490 INCHES MAXIMUM IN |
| First End Groove Diameter | 0.7120 INCHES MINIMUM AND 0.7180 INCHES MAXIMUM IN |
| Second End Style | CIRCULAR GROOVED |
| Material | STEEL COMP 4130 |
| First End Groove Width | 0.0460 INCHES MINIMUM AND 0.0490 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 |
|---|---|
| STC90232-3 PRIMARY | Spec Tool Company (USA) |
NSN 3040-01-254-4539 is a Shaft,shouldered, manufactured by Spec Tool Company, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-254-4539 has 1 manufacturer part number on file: STC90232-3 (Spec Tool Company).
Key specifications for STC90232-3: Surface Finish: 125.0 MICROINCHES; Step Quantity: 1; First End Diameter: 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Second End Diameter: 0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN. 17 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.