The Shaft,straight, cataloged under National Stock Number 3040-01-451-9840, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-451-9840 |
| Primary Part Number | EJ-21281 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| First End Diameter | 1.0000 INCHES NOMINAL IN |
| Material | STEEL COMP 1141 |
| 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 |
|---|---|
| EJ51121 ITEM NO. 9 | The Entwistle Company Llc (USA) |
| EJ-21281 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| EJ51121 | D/9 Drawing number reference only The Entwistle Company Llc |
NSN 3040-01-451-9840 is a Shaft,straight, manufactured by The Entwistle Company Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-451-9840 has 2 manufacturer part numbers on file: EJ51121 ITEM NO. 9 (The Entwistle Company Llc), EJ-21281 (The Entwistle Company Llc).
Key specifications for EJ-21281: First End Diameter: 1.0000 INCHES NOMINAL IN; Overall Length: 4.000 INCHES NOMINAL IN; End Item Identification: MODEL T12 SLIDING PADEY; ARLEIGH BURKE CLASS DDG; Material: STEEL COMP 1141. 2 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.