The Shaft,shouldered, cataloged under National Stock Number 3040-01-389-6436, 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 11 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 | 3040-01-389-6436 |
| Primary Part Number | 12385235 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| First End Pitch Diameter | 1.1875 INCHES NOMINAL IN |
| Step Quantity | 8 |
| First End Diameter | 1.2491 INCHES MINIMUM AND 1.2496 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 1.2441 INCHES NOMINAL IN |
| Largest Step Diameter | 1.249 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| First End Style | SPLINED (INVOLUTE) |
| First End Pressure Angle | 45.0 DEGREES NOMINAL |
| First End Spline Quantity | 18 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 1.1130 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 |
| 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 |
|---|---|
| 12385235 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-389-6436 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 3040-01-389-6436 has 1 manufacturer part number on file: 12385235 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12385235: First End Pitch Diameter: 1.1875 INCHES NOMINAL IN; Step Quantity: 8; First End Diameter: 1.2491 INCHES MINIMUM AND 1.2496 INCHES MAXIMUM IN; First End Spline Major Diameter: 1.2441 INCHES NOMINAL IN. 11 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.