The Shaft,straight, cataloged under National Stock Number 3040-01-139-1908, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-139-1908 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Second End Grooved Flat Length | 0.2812 INCHES NOMINAL IN |
| First End Diameter | 2.1654 INCHES NOMINAL IN |
| Second End Distance From End to Flat | 0.312 INCHES NOMINAL IN |
| Second End Diameter | 2.1654 INCHES NOMINAL IN |
| First End Style | PLAIN |
| End Similarity | NOT IDENTICAL |
| Second End Grooved Flat Depth | 0.226 INCHES NOMINAL IN |
| Second End Style | FLAT GROOVED |
| Material | STEEL COMP 1018 |
| 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 |
|---|---|
| B1072P394 | 3/2 Design control — primary reference U.S. Government activity |
| 200669-D-001 | D/9 Drawing number reference only U.S. Government activity |
| 200669-D-001 ITEM 10 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-139-1908 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-143-9469. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-139-1908: Second End Grooved Flat Length: 0.2812 INCHES NOMINAL IN; First End Diameter: 2.1654 INCHES NOMINAL IN; Second End Distance From End to Flat: 0.312 INCHES NOMINAL IN; Second End Diameter: 2.1654 INCHES NOMINAL IN. 9 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.