The Extension Shaft, cataloged under National Stock Number 3040-01-421-1600, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-421-1600 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Length | 0.920 INCHES NOMINAL IN |
| Internal Thread Length | 0.285 INCHES NOMINAL IN |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Shaft End Design | FEMALE |
| Shaft End Diameter | 0.284 INCHES NOMINAL IN |
| Nominal Thread Size | 0.112 INCHES SOCKET EXTERNAL IN |
| Surface Treatment | PASSIVATE |
| Thread Quantity Per Inch | 40 SOCKET EXTERNAL |
| Material | STEEL COMP 303 |
| Shoulder Length | 0.185 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SOCKET EXTERNAL |
| End Type | PROCESSED END |
| Shaft End Configuration | ROUND |
| Attachment Method | SLOT |
| 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 |
|---|---|
| 523032 | D/9 Drawing number reference only U.S. Government activity |
| 523032-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-01-421-1600 is a Extension Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-421-1600: Length: 0.920 INCHES NOMINAL IN; Internal Thread Length: 0.285 INCHES NOMINAL IN; Outside Diameter: 0.375 INCHES NOMINAL IN; Shaft End Design: FEMALE. 14 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.