The Shaft,shouldered, cataloged under National Stock Number 3040-00-679-9623, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-679-9623 |
| Primary Part Number | 8756583 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| First End Pitch Diameter | 1.5625 INCHES NOMINAL IN |
| Step Quantity | 7 |
| First End Diameter | 1.4375 INCHES MINIMUM AND 1.4688 INCHES MAXIMUM IN |
| First End Spline Major Diameter | 1.6086 INCHES MINIMUM AND 1.6136 INCHES MAXIMUM IN |
| Largest Step Diameter | 5.750 INCHES NOMINAL IN |
| First End Style | SPLINED (INVOLUTE) |
| Material Document and Classification | MIL-S-46172 MIL SPEC SINGLE MATERIAL RESPONSE |
| First End Pressure Angle | 30.0 DEGREES NOMINAL |
| First End Spline Length | 2.8750 INCHES NOMINAL IN |
| First End Spline Quantity | 25 |
| End Similarity | NOT IDENTICAL |
| First End Spline Minor Diameter | 1.4725 INCHES MINIMUM AND 1.4835 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
|---|---|
| 8756583 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2520006799623 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 8756583 | 5/9 Secondary reference Fairfield Manufacturing Company, Inc. Dba Dana Fairfield |
| 8754583 | 5/9 Secondary reference Spalla Inc |
NSN 3040-00-679-9623 is a Shaft,shouldered, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-679-9623 has 1 manufacturer part number on file: 8756583 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8756583: First End Pitch Diameter: 1.5625 INCHES NOMINAL IN; Step Quantity: 7; First End Diameter: 1.4375 INCHES MINIMUM AND 1.4688 INCHES MAXIMUM IN; First End Spline Major Diameter: 1.6086 INCHES MINIMUM AND 1.6136 INCHES MAXIMUM 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.