The Shaft,shouldered, cataloged under National Stock Number 3040-01-373-7078, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is L & S Electric Inc Dba L & S Electric Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-373-7078 |
| Primary Part Number | B-511841-1450 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | L & S Electric Inc Dba L & S Electric Inc |
| Status | ACTIVE |
| First End Diameter | 2.3750 INCHES MAXIMUM IN |
| First End Style | FLAT KEYWAY |
| First End Keyway Depth | 0.6200 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 4.2500 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.6200 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 |
|---|---|
| B-511841-1450 PRIMARY | L & S Electric Inc Dba L & S Electric Inc (USA) |
| Reference | Meaning |
|---|---|
| B-511841-1450 | 5/9 Secondary reference Marathon Electric, Llc |
| B-SS504688 | D/9 Drawing number reference only Marathon Electric, Llc |
NSN 3040-01-373-7078 is a Shaft,shouldered, manufactured by L & S Electric Inc Dba L & S Electric Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-373-7078 has 1 manufacturer part number on file: B-511841-1450 (L & S Electric Inc Dba L & S Electric Inc).
Key specifications for B-511841-1450: First End Diameter: 2.3750 INCHES MAXIMUM IN; First End Style: FLAT KEYWAY; Overall Length: 32.5000 INCHES NOMINAL IN; First End Keyway Depth: 0.6200 INCHES NOMINAL IN. 8 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.