The Shaft,shouldered, cataloged under National Stock Number 3040-01-121-0601, 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 23 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 | 3040-01-121-0601 |
| Primary Part Number | 1N7173 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Second End Hole Diameter | 0.1410 INCHES NOMINAL IN |
| Second End External Thread Length | 0.614 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 0.7640 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.6700 INCHES MINIMUM AND 0.6760 INCHES MAXIMUM IN |
| Second End Diameter | 0.4930 INCHES NOMINAL IN |
| Largest Step Diameter | 1.247 INCHES MINIMUM AND 1.253 INCHES MAXIMUM IN |
| First End Distance Between First and Second Groove Centers | 1.562 INCHES NOMINAL IN |
| First End Style | TWO CIRCULAR GROOVES AND SPLINED (STRAIGHT_) |
| Second End Groove Diameter | 0.3845 INCHES MINIMUM AND 0.3855 INCHES MAXIMUM IN |
| Second End Distance From Hole Center to End | 0.170 INCHES NOMINAL IN |
| First End Spline Length | 1.060 INCHES NOMINAL IN |
| Second End Hole Depth | 0.500 INCHES NOMINAL IN |
| First End Spline Quantity | 6 |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 1.060 INCHES NOMINAL IN |
| Second End Groove Width | 0.1560 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.806 INCHES NOMINAL IN |
| First End Groove Diameter | 0.4672 INCHES MINIMUM AND 0.4688 INCHES MAXIMUM IN |
| Second End Style | CIRCULAR GROOVED, CROSS DRILLED HOLE, AND EXTERNALLY THREADED |
| First End Spline Minor Diameter | 0.6200 INCHES NOMINAL IN |
| Material | STEEL |
| First End Groove Width | 0.1900 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 |
|---|---|
| 1N7173 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3040-01-121-0601 is a Shaft,shouldered, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-121-0601 has 1 manufacturer part number on file: 1N7173 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1N7173: Second End Hole Diameter: 0.1410 INCHES NOMINAL IN; Second End External Thread Length: 0.614 INCHES NOMINAL IN; Step Quantity: 4; First End Diameter: 0.7640 INCHES NOMINAL IN. 23 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.