The Shaft,straight, cataloged under National Stock Number 3040-00-678-1785, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-00-678-1785 |
| Primary Part Number | 8754139 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| First End Diameter | 0.5595 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN |
| Second End Diameter | 0.5595 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN |
| Second End Angle Between Keyways | 180.0 DEGREES NOMINAL |
| First End Style | PLAIN |
| Second End Keyway Width | 0.0900 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Keyway Depth | 0.060 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | TWO FLAT KEYWAYS |
| Material | STEEL |
| External Keyway Length | 1.470 INCHES NOMINAL SECOND END IN |
| 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 |
|---|---|
| 8754139 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2520006781785 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 3040-00-678-1785 is a Shaft,straight, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-678-1785 has 1 manufacturer part number on file: 8754139 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8754139: Surface Finish: 32.0 MICROINCHES; First End Diameter: 0.5595 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN; Second End Diameter: 0.5595 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN; Second End Angle Between Keyways: 180.0 DEGREES NOMINAL. 12 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.