The Shaft,straight, cataloged under National Stock Number 3040-01-381-2257, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-381-2257 |
| Primary Part Number | 025700-1 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| First End Pitch Diameter | 0.4688 INCHES NOMINAL IN |
| First End Diameter | 0.4985 INCHES NOMINAL IN |
| First End Spline Major Diameter | 0.4995 INCHES NOMINAL IN |
| First End Style | SPLINED (INVOLUTE) |
| First End Pressure Angle | 30.0 DEGREES NOMINAL |
| First End Spline Length | 11.1070 INCHES NOMINAL IN |
| First End Spline Quantity | 15 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 0.4140 INCHES NOMINAL IN |
| Material | STEEL COMP 17-4PH |
| 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 |
|---|---|
| 025700-1 PRIMARY | Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 025700-1 | 3/9 Design control — primary reference Meggitt Defense Systems, Inc. Dba Meggitt Western Design |
NSN 3040-01-381-2257 is a Shaft,straight, manufactured by Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-381-2257 has 1 manufacturer part number on file: 025700-1 (Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5920-01-566-3492. Verify interchangeability with system specifications before substitution.
Key specifications for 025700-1: Surface Finish: 125.0 MICROINCHES; First End Pitch Diameter: 0.4688 INCHES NOMINAL IN; First End Diameter: 0.4985 INCHES NOMINAL IN; First End Spline Major Diameter: 0.4995 INCHES NOMINAL IN. 11 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.