The Shaft,shouldered, cataloged under National Stock Number 3040-01-110-9878, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-110-9878 |
| Primary Part Number | 503961 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Second End Grooved Flat Length | 0.3750 INCHES NOMINAL IN |
| Step Quantity | 2 |
| First End Diameter | 0.3750 INCHES NOMINAL IN |
| Second End Distance From End to Flat | 0.2500 INCHES NOMINAL IN |
| Second End Diameter | 0.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 0.875 INCHES NOMINAL IN |
| First End External Thread Length | 0.5000 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Grooved Flat Depth | 0.3750 INCHES NOMINAL IN |
| Second End Style | FLAT GROOVED |
| Material | STEEL COMP 304 |
| 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 |
|---|---|
| 503961 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 503961 | 5/9 Secondary reference Cardion Inc |
NSN 3040-01-110-9878 is a Shaft,shouldered, manufactured by Aimtron Systems, Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-110-9878 has 1 manufacturer part number on file: 503961 (Aimtron Systems, Llc).
Key specifications for 503961: Second End Grooved Flat Length: 0.3750 INCHES NOMINAL IN; Step Quantity: 2; First End Diameter: 0.3750 INCHES NOMINAL IN; Second End Distance From End to Flat: 0.2500 INCHES NOMINAL IN. 13 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.