The Extension Shaft, cataloged under National Stock Number 3040-01-169-2957, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Leidos, Inc. Div Cyber and Information Solutions Services. Government technical data includes 15 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 | 3040-01-169-2957 |
| Primary Part Number | 2078 |
| Item Name | Extension Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Leidos, Inc. Div Cyber and Information Solutions Services |
| Status | ACTIVE |
| Socket Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Length | 1.600 INCHES NOMINAL IN |
| Socket Depth | 0.400 INCHES NOMINAL IN |
| Style Designator | PLAIN SOCKET |
| Outside Diameter | 0.500 INCHES NOMINAL IN |
| Shaft End Design | MALE |
| Shaft End Diameter | 0.248 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.138 INCHES SCREW HOLE IN |
| Surface Treatment | PASSIVATE |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Material | STEEL COMP 303 |
| Shoulder Length | 0.680 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| End Type | INTEGRAL COUPLING |
| Shaft End Configuration | FLATTED ROUND |
| 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 |
|---|---|
| 2078 PRIMARY | Leidos, Inc. Div Cyber and Information Solutions Services (USA) |
NSN 3040-01-169-2957 is a Extension Shaft, manufactured by Leidos, Inc. Div Cyber and Information Solutions Services, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-169-2957 has 1 manufacturer part number on file: 2078 (Leidos, Inc. Div Cyber and Information Solutions Services).
Key specifications for 2078: Socket Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Length: 1.600 INCHES NOMINAL IN; Socket Depth: 0.400 INCHES NOMINAL IN; Style Designator: PLAIN SOCKET. 15 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.