The Shaft,shouldered, cataloged under National Stock Number 3040-00-122-0639, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-122-0639 |
| Primary Part Number | 4M0358 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Step Quantity | 3 |
| First End Diameter | 0.7450 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 0.562 INCHES NOMINAL IN |
| Second End Diameter | 0.7450 INCHES NOMINAL IN |
| Largest Step Diameter | 1.625 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.5312 INCHES NOMINAL IN |
| First End Style | WOODRUFF KEYWAY |
| Second End Spline Major Diameter | 0.7400 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 8 |
| Second End Pressure Angle | 30.0000 DEGREES NOMINAL |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL |
| Second End Pitch Diameter | 0.6250 INCHES NOMINAL IN |
| External Keyway Length | 0.875 INCHES NOMINAL FIRST END IN |
| Second End Spline Length | 0.875 INCHES NOMINAL IN |
| First End Keyway Width | 0.1562 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 |
|---|---|
| 4M0358 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 4M358 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
| IPD4M0358 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
NSN 3040-00-122-0639 is a Shaft,shouldered, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-122-0639 has 1 manufacturer part number on file: 4M0358 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4M0358: Step Quantity: 3; First End Diameter: 0.7450 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 0.562 INCHES NOMINAL IN; Second End Diameter: 0.7450 INCHES NOMINAL 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.