The Shaft,straight, cataloged under National Stock Number 3040-01-375-7288, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-375-7288 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| First End Diameter | 11.9990 INCHES MINIMUM AND 12.0000 INCHES MAXIMUM IN |
| Second End Diameter | 11.9990 INCHES MINIMUM AND 12.0000 INCHES MAXIMUM IN |
| Second End Angle Between Keyways | 180.0 DEGREES NOMINAL |
| Second End Distance From Keyway Center to End | 7.5000 INCHES NOMINAL IN |
| First End Style | TWO FLAT KEYWAYS |
| Second End Keyway Width | 2.0020 INCHES MINIMUM AND 2.0040 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A291-62T CL 4 ASSN STD SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.750 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.7500 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | TWO INDENTED FLAT KEYWAYS |
| First End Angle Between Keyways | 180.0 DEGREES NOMINAL |
| Material | STEEL |
| External Keyway Length | 13.380 INCHES NOMINAL FIRST END IN |
| External Keyway Length | 14.5000 INCHES NOMINAL SECOND END IN |
| First End Keyway Width | 2.0020 INCHES MINIMUM AND 2.0040 INCHES MAXIMUM 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 |
|---|---|
| 27881 | 3/9 Design control — primary reference Calgon Carbon Uv Technologies Llc Dba Hyde Marine |
NSN 3040-01-375-7288 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): 5305-01-529-3086. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-375-7288: First End Diameter: 11.9990 INCHES MINIMUM AND 12.0000 INCHES MAXIMUM IN; Second End Diameter: 11.9990 INCHES MINIMUM AND 12.0000 INCHES MAXIMUM IN; Second End Angle Between Keyways: 180.0 DEGREES NOMINAL; Second End Distance From Keyway Center to End: 7.5000 INCHES NOMINAL IN. 16 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.