The Extension Shaft, cataloged under National Stock Number 3040-01-433-3023, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-433-3023 |
| Primary Part Number | 512-6404653 ITEM 38 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Socket Diameter | 1.125 INCHES NOMINAL IN |
| Length | 9.038 INCHES NOMINAL IN |
| Internal Thread Length | 2.260 INCHES NOMINAL IN |
| Outside Diameter | 2.250 INCHES NOMINAL IN |
| Shaft End Configuration | SPLINED |
| 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 |
|---|---|
| 512-6404653 ITEM 38 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF6503-175 ITEM 38 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6404653 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-433-3023 is a Extension Shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-433-3023 has 1 manufacturer part number on file: 512-6404653 ITEM 38 (Naval Sea Systems Command).
Key specifications for 512-6404653 ITEM 38: Socket Diameter: 1.125 INCHES NOMINAL IN; Length: 9.038 INCHES NOMINAL IN; Internal Thread Length: 2.260 INCHES NOMINAL IN; Outside Diameter: 2.250 INCHES NOMINAL IN. 5 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.