The Shaft,shouldered, cataloged under National Stock Number 3040-01-389-6791, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Curtiss-Wright Controls Integrated Sensing, Inc.. Government technical data includes 21 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 | 3040-01-389-6791 |
| Primary Part Number | 2660-1635-02 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Curtiss-Wright Controls Integrated Sensing, Inc. |
| Status | ACTIVE |
| Step Quantity | 9 |
| First End Diameter | 0.4260 INCHES MINIMUM AND 0.4310 INCHES MAXIMUM IN |
| First End Distance From Keyway Center to End | 1.126 INCHES NOMINAL IN |
| Second End Diameter | 0.6826 INCHES MINIMUM AND 0.6926 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.973 INCHES MINIMUM AND 0.975 INCHES MAXIMUM IN |
| First End External Thread Length | 0.500 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED WOODRUFF KEYWAY AND EXTERNALLY THREADED |
| Second End Spline Major Diameter | 0.8450 INCHES MINIMUM AND 0.8500 INCHES MAXIMUM IN |
| Material Document and Classification | AISI4340 ASSN STD SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.4450 INCHES MINIMUM AND 0.4550 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.548 INCHES NOMINAL IN |
| Second End Spline Quantity | 16 |
| Second End Distance From End to Groove | 0.400 INCHES MINIMUM IN |
| First End Groove Diameter | 0.4400 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND SPLINED (STRAIGHT) |
| Material | STEEL COMP 4340 |
| First End Groove Width | 0.0950 INCHES NOMINAL IN |
| External Keyway Length | 0.875 INCHES NOMINAL FIRST END IN |
| Second End Spline Length | 0.400 INCHES NOMINAL IN |
| First End Keyway Width | 0.1240 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 2660-1635-02 PRIMARY | Curtiss-Wright Controls Integrated Sensing, Inc. (USA) |
NSN 3040-01-389-6791 is a Shaft,shouldered, manufactured by Curtiss-Wright Controls Integrated Sensing, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-389-6791 has 1 manufacturer part number on file: 2660-1635-02 (Curtiss-Wright Controls Integrated Sensing, Inc.).
Key specifications for 2660-1635-02: Step Quantity: 9; First End Diameter: 0.4260 INCHES MINIMUM AND 0.4310 INCHES MAXIMUM IN; First End Distance From Keyway Center to End: 1.126 INCHES NOMINAL IN; Second End Diameter: 0.6826 INCHES MINIMUM AND 0.6926 INCHES MAXIMUM IN. 21 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.