The Shaft,straight, cataloged under National Stock Number 3040-00-021-7985, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-021-7985 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| First End Diameter | 0.3740 INCHES NOMINAL IN |
| First End Slot Width | 0.125 INCHES NOMINAL IN |
| First End Style | CROSS DRILLED HOLE AND SLOTTED |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE |
| Second End Slot Depth | 0.620 INCHES NOMINAL IN |
| End Similarity | IDENTICAL |
| First End Slot Depth | 0.125 INCHES NOMINAL IN |
| Second End Slot Width | 0.125 INCHES NOMINAL IN |
| First End Hole Diameter | 0.1250 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 |
| First End Distance From Hole Center to End | 2.000 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 |
|---|---|
| 26-16296 | D/9 Drawing number reference only U.S. Government activity |
| 26-16296-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-021-7985 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-021-7985: Surface Finish: 125.0 MICROINCHES; First End Diameter: 0.3740 INCHES NOMINAL IN; First End Slot Width: 0.125 INCHES NOMINAL IN; First End Style: CROSS DRILLED HOLE AND SLOTTED. 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.