The Shaft,shouldered, cataloged under National Stock Number 3040-01-218-0014, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-218-0014 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 5 |
| First End Diameter | 0.9975 INCHES NOMINAL IN |
| Second End Diameter | 1.9960 INCHES NOMINAL IN |
| Largest Step Diameter | 2.496 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 1.7105 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 1.9960 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 CLA FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 10 |
| Second End Style | SPLINED (STRAIGHT) |
| Material | NICKEL ALLOY |
| Second End Spline Length | 2.125 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 |
|---|---|
| SSBN598-518-2181984 | D/9 Drawing number reference only U.S. Government activity |
| 9869-534X5 | D/9 Drawing number reference only U.S. Government activity |
| 9869-534X5 PIECE 18 | 3/2 Design control — primary reference U.S. Government activity |
| SSBN598-518-2181984 PIECE 18 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-218-0014 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-218-3467. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-218-0014: Surface Finish: 125.0 MICROINCHES; Step Quantity: 5; First End Diameter: 0.9975 INCHES NOMINAL IN; Second End Diameter: 1.9960 INCHES NOMINAL IN. 14 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.