The Shaft,shouldered, cataloged under National Stock Number 3040-01-291-5850, 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 16 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 | 3040-01-291-5850 |
| Primary Part Number | 12268240 |
| 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 | 16.0 MICROINCHES |
| Step Quantity | 7 |
| First End Diameter | 0.7520 INCHES NOMINAL IN |
| Second End Diameter | 0.9048 INCHES NOMINAL IN |
| Largest Step Diameter | 1.250 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.8085 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 0.9048 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A331 ASSN STD SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 28 |
| Second End Pressure Angle | 30.0 DEGREES NOMINAL |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL COMP 4130 OR STEEL COMP 8630 |
| Second End Pitch Diameter | 0.8750 INCHES NOMINAL IN |
| Second End Spline Length | 0.9370 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 |
|---|---|
| 12268240 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-291-5850 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 3040-01-291-5850 has 1 manufacturer part number on file: 12268240 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12268240: Surface Finish: 16.0 MICROINCHES; Step Quantity: 7; First End Diameter: 0.7520 INCHES NOMINAL IN; Second End Diameter: 0.9048 INCHES NOMINAL IN. 16 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.