The Shaft,straight, cataloged under National Stock Number 3040-01-142-2985, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-142-2985 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| First End Diameter | 1.8720 INCHES MINIMUM AND 1.8730 INCHES MAXIMUM IN |
| Second End Diameter | 1.8700 INCHES MINIMUM AND 1.8710 INCHES MAXIMUM IN |
| Second End Distance From Keyway Center to End | 1.312 INCHES NOMINAL IN |
| First End Style | FLAT KEYWAY |
| Second End Keyway Width | 0.4375 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-741 FED SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.219 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.219 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | INDENTED FLAT KEYWAY |
| Material | STEEL |
| External Keyway Length | 2.375 INCHES NOMINAL FIRST END IN |
| External Keyway Length | 2.375 INCHES NOMINAL SECOND END IN |
| First End Keyway Width | 0.4375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5256781 PIECE 2 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3040-01-142-2985 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-142-2985: Surface Finish: 63.0 MICROINCHES; First End Diameter: 1.8720 INCHES MINIMUM AND 1.8730 INCHES MAXIMUM IN; Second End Diameter: 1.8700 INCHES MINIMUM AND 1.8710 INCHES MAXIMUM IN; Second End Distance From Keyway Center to End: 1.312 INCHES NOMINAL IN. 15 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.