The Extension Shaft, cataloged under National Stock Number 3040-01-224-4043, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-224-4043 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Length | 3.750 INCHES NOMINAL IN |
| Internal Thread Length | 1.000 INCHES NOMINAL IN |
| Style Designator | THREADED SOCKET |
| Material Document and Classification | MIL-S-6758,COMP C4 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758,COMP D4 MIL SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 0.382 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN |
| Shaft End Design | FEMALE |
| Nominal Thread Size | 0.3125 INCHES SCREW HOLE IN |
| Thread Quantity Per Inch | 18 SCREW HOLE |
| Material | STEEL COMP 4130 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| End Type | PROCESSED END |
| Shaft End Configuration | ROUND W/SCREW DRIVE SLOT AND ROUND |
| 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 |
|---|---|
| 204-030-479-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-224-4043 is a Extension Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-224-4043: Length: 3.750 INCHES NOMINAL IN; Internal Thread Length: 1.000 INCHES NOMINAL IN; Style Designator: THREADED SOCKET; Material Document and Classification: MIL-S-6758,COMP C4 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758,COMP D4 MIL SPEC SINGLE MATERIAL RESPONSE. 12 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.