The Shaft,straight, cataloged under National Stock Number 3040-01-237-6253, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-237-6253 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| First End Diameter | 1.3750 INCHES NOMINAL IN |
| First End Spline Major Diameter | 1.3750 INCHES NOMINAL IN |
| First End Style | SPLINED (STRAIGHT) |
| Material Document and Classification | QQ-S-763,CLASS 304,CONDITION A FED SPEC SINGLE MATERIAL RESPONSE |
| First End Spline Length | 1.188 INCHES NOMINAL IN |
| First End Spline Quantity | 10 |
| End Similarity | IDENTICAL |
| First End Spline Minor Diameter | 1.1745 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| SSN637-709-2144235 PIECE 26 | 5/2 Secondary reference U.S. Government activity |
| 77832-60X3 PIECE 26 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-709-2144235 | D/9 Drawing number reference only U.S. Government activity |
| 77832-60X3 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-237-6253 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
9 possible matches (shared part number, not a government interchangeability claim): 3040-01-237-6254, 3040-01-237-6255, 3040-01-237-6256. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-01-237-6253: Surface Finish: 63.0 MICROINCHES; First End Diameter: 1.3750 INCHES NOMINAL IN; First End Spline Major Diameter: 1.3750 INCHES NOMINAL IN; First End Style: SPLINED (STRAIGHT). 10 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.