The Shaft,shouldered, cataloged under National Stock Number 3040-01-727-9543, 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 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-727-9543 |
| Primary Part Number | 12640599 |
| 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 | 58.42 MILLIMETERS NOMINAL MM |
| Second End Diameter | 45.0 MILLIMETERS MINIMUM AND 46.0 MILLIMETERS MAXIMUM MM |
| First End Style | TAPERED, WITH FLAT AND SLOTTED |
| Material Document and Classification | ASTM A322-13 GRADE 4340 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE |
| End Similarity | IDENTICAL |
| Second End Slot Width | 5.6 MILLIMETERS MINIMUM AND 7.1 MILLIMETERS MAXIMUM MM |
| First End Taper Major Diameter | 69.59 INCHES MINIMUM AND 69.72 INCHES MAXIMUM IN |
| Second End Pressure Angle | 37.5 DEGREES NOMINAL |
| Second End Style | SLOTTED AND INTERNALLY THREADED |
| First End Spline Minor Diameter | 56.413 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 12640599 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-727-9543 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 3040-01-727-9543 has 1 manufacturer part number on file: 12640599 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12640599: First End Pitch Diameter: 58.42 MILLIMETERS NOMINAL MM; Second End Diameter: 45.0 MILLIMETERS MINIMUM AND 46.0 MILLIMETERS MAXIMUM MM; First End Style: TAPERED, WITH FLAT AND SLOTTED; Material Document and Classification: ASTM A322-13 GRADE 4340 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE. 11 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.