The Extension Shaft, cataloged under National Stock Number 3040-01-644-2008, 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 6 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 | 3040-01-644-2008 |
| Primary Part Number | 12590673 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Length | 9.75 INCHES NOMINAL IN |
| Style Designator | FLATTED |
| Material Document and Classification | STEEL ROUND, IAW ASTM A108 ASSN STD ALL MATERIAL RESPONSES |
| Shaft End Diameter | 5.0 INCHES NOMINAL IN |
| Material | STEEL |
| Shaft End Configuration | FLATTED ROUND AND SQUARE |
| 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 |
|---|---|
| 12590673 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-01-644-2008 is a Extension Shaft, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-644-2008 has 1 manufacturer part number on file: 12590673 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12590673: Length: 9.75 INCHES NOMINAL IN; Style Designator: FLATTED; Material Document and Classification: STEEL ROUND, IAW ASTM A108 ASSN STD ALL MATERIAL RESPONSES; Shaft End Diameter: 5.0 INCHES NOMINAL IN. 6 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.