The Shaft,straight, cataloged under National Stock Number 3040-01-122-3983, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Aimtron Systems, Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-122-3983 |
| Primary Part Number | 503959 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| First End Diameter | 0.2500 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED |
| End Similarity | IDENTICAL |
| First End Distance From End to Groove | 0.102 INCHES NOMINAL IN |
| First End Groove Diameter | 0.2300 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| First End Groove Width | 0.0290 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 |
|---|---|
| 503959 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 503959 | 5/9 Secondary reference Cardion Inc |
NSN 3040-01-122-3983 is a Shaft,straight, manufactured by Aimtron Systems, Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-122-3983 has 1 manufacturer part number on file: 503959 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-4781. Verify interchangeability with system specifications before substitution.
Key specifications for 503959: First End Diameter: 0.2500 INCHES NOMINAL IN; First End Style: CIRCULAR GROOVED; Overall Length: 1.562 INCHES NOMINAL IN; End Similarity: IDENTICAL. 7 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.