The Shaft,shouldered, cataloged under National Stock Number 3040-01-121-0629, 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 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 | 3040-01-121-0629 |
| Primary Part Number | 6L2166 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Step Quantity | 4 |
| First End Diameter | 1.2450 INCHES MINIMUM AND 1.2460 INCHES MAXIMUM IN |
| Second End Diameter | 1.2450 INCHES MINIMUM AND 1.2460 INCHES MAXIMUM IN |
| Largest Step Diameter | 3.380 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| First End Keyway Depth | 0.130 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | PLAIN |
| Material | STEEL |
| External Keyway Length | 2.750 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.2490 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6L2166 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3040-01-121-0629 is a Shaft,shouldered, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-121-0629 has 1 manufacturer part number on file: 6L2166 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 6L2166: Step Quantity: 4; First End Diameter: 1.2450 INCHES MINIMUM AND 1.2460 INCHES MAXIMUM IN; Second End Diameter: 1.2450 INCHES MINIMUM AND 1.2460 INCHES MAXIMUM IN; Largest Step Diameter: 3.380 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.
NSN 3040-01-121-0629 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.