The Shaft,shouldered, cataloged under National Stock Number 3040-01-122-7746, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is R F Products, Inc. Government technical data includes 14 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 | 3040-01-122-7746 |
| Primary Part Number | 643740 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | R F Products, Inc |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 4 |
| First End Diameter | 0.1248 INCHES NOMINAL IN |
| Second End Diameter | 0.1248 INCHES NOMINAL IN |
| Largest Step Diameter | 0.187 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Groove Diameter | 0.0950 INCHES NOMINAL IN |
| Second End Slot Depth | 0.031 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Slot Width | 0.031 INCHES NOMINAL IN |
| Second End Groove Width | 0.0180 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.090 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND SLOTTED |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 643740 PRIMARY | R F Products, Inc (USA) |
NSN 3040-01-122-7746 is a Shaft,shouldered, manufactured by R F Products, Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-122-7746 has 1 manufacturer part number on file: 643740 (R F Products, Inc).
Key specifications for 643740: Surface Finish: 125.0 MICROINCHES; Step Quantity: 4; First End Diameter: 0.1248 INCHES NOMINAL IN; Second End Diameter: 0.1248 INCHES NOMINAL IN. 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.