The Shaft,straight, cataloged under National Stock Number 3040-01-398-9955, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-398-9955 |
| Primary Part Number | F525-11172-14 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Second End Hole Diameter | 0.2500 INCHES MINIMUM AND 0.2540 INCHES MAXIMUM IN |
| First End Diameter | 0.7500 INCHES NOMINAL IN |
| Second End Diameter | 0.7500 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Distance From Hole Center to End | 1.530 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | UNTHREADED CROSS DRILLED |
| Material | STEEL COMP 303SE OR STEEL COMP 303 |
| 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 |
|---|---|
| F525-11172-14 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| F525-11172 | D/9 Drawing number reference only U.S. Government activity |
| F525-11172-14 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-398-9955 is a Shaft,straight, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-398-9955 has 1 manufacturer part number on file: F525-11172-14 (Northrop Grumman Systems Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-398-9958, 3020-01-398-9961. Verify interchangeability with system specifications before substitution.
Key specifications for F525-11172-14: Second End Hole Diameter: 0.2500 INCHES MINIMUM AND 0.2540 INCHES MAXIMUM IN; First End Diameter: 0.7500 INCHES NOMINAL IN; Second End Diameter: 0.7500 INCHES NOMINAL IN; First End Style: PLAIN. 8 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.