The Shaft,shouldered, cataloged under National Stock Number 3040-01-112-3557, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Snowbird Technologies 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-112-3557 |
| Primary Part Number | 518-001 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Snowbird Technologies Inc. |
| Status | ACTIVE |
| Step Quantity | 3 |
| First End Diameter | 0.4900 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| First End Step Length | 1.000 INCHES NOMINAL IN |
| Largest Step Diameter | 1.000 INCHES NOMINAL IN |
| First End Angle Between Flats | 90.0 DEGREES NOMINAL |
| First End Style | TWO FLATS |
| End Similarity | IDENTICAL |
| Material | STEEL COMP 1025 OR STEEL COMP 1045 |
| 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 |
|---|---|
| 518-001 PRIMARY | Snowbird Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 518-001 | 5/9 Secondary reference A R E Mfg Co Inc |
NSN 3040-01-112-3557 is a Shaft,shouldered, manufactured by Snowbird Technologies Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-112-3557 has 1 manufacturer part number on file: 518-001 (Snowbird Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-341-1404. Verify interchangeability with system specifications before substitution.
Key specifications for 518-001: Step Quantity: 3; First End Diameter: 0.4900 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN; First End Step Length: 1.000 INCHES NOMINAL IN; Largest Step Diameter: 1.000 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.