The Shaft,shouldered, cataloged under National Stock Number 3040-01-194-7878, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Swiss Precision Products, Inc. Dba Swiss Precision Products Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-194-7878 |
| Primary Part Number | 77643-74X2 PC 23 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Swiss Precision Products, Inc. Dba Swiss Precision Products Inc |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 3 |
| First End Diameter | 0.8750 INCHES NOMINAL IN |
| Largest Step Diameter | 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN |
| First End External Thread Length | 0.938 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Material Document and Classification | QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | IDENTICAL |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 77643-74X2 PC 23 PRIMARY | Swiss Precision Products, Inc. Dba Swiss Precision Products Inc (USA) |
| Reference | Meaning |
|---|---|
| SSN637-501-2143875 PIECE 23 | 5/2 Secondary reference U.S. Government activity |
| SSN637-501-2143875 | D/9 Drawing number reference only U.S. Government activity |
| 77643-74-X 2 | D/9 Drawing number reference only U.S. Government activity |
| 77643-74-X 2 PIECE 23 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-194-7878 is a Shaft,shouldered, manufactured by Swiss Precision Products, Inc. Dba Swiss Precision Products Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-194-7878 has 1 manufacturer part number on file: 77643-74X2 PC 23 (Swiss Precision Products, Inc. Dba Swiss Precision Products Inc).
Key specifications for 77643-74X2 PC 23: Surface Finish: 125.0 MICROINCHES; Step Quantity: 3; First End Diameter: 0.8750 INCHES NOMINAL IN; Largest Step Diameter: 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN. 9 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.