The Extension Shaft, cataloged under National Stock Number 3040-01-287-7796, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-287-7796 |
| Primary Part Number | 1366AS642 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Socket Diameter | 1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN |
| Length | 6.250 INCHES NOMINAL IN |
| Socket Depth | 2.310 INCHES NOMINAL IN |
| Style Designator | PLAIN SOCKET |
| Material Document and Classification | AISI E4340 ANLD ASSN STD SINGLE MATERIAL RESPONSE |
| Outside Diameter | 3.250 INCHES NOMINAL IN |
| Shaft End Design | FEMALE |
| Shaft End Diameter | 1.558 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.190 INCHES SCREW HOLE IN |
| Surface Treatment | CADMIUM |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Material | STEEL |
| Shoulder Length | 4.190 INCHES NOMINAL IN |
| Thread Series Designator | UNF SCREW HOLE |
| End Type | INTEGRAL COUPLING |
| Shaft End Configuration | ROUND W/KEYWAY |
| 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 |
|---|---|
| 1366AS642 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 3040-01-287-7796 is a Extension Shaft, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-287-7796 has 1 manufacturer part number on file: 1366AS642 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1366AS642: Socket Diameter: 1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN; Length: 6.250 INCHES NOMINAL IN; Socket Depth: 2.310 INCHES NOMINAL IN; Style Designator: PLAIN SOCKET. 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.