The Shaft,shouldered, cataloged under National Stock Number 3040-00-012-6026, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-012-6026 |
| Primary Part Number | S6135-20684-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| First End Width Across Flats | 0.280 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN |
| Step Quantity | 5 |
| First End Diameter | 0.4370 INCHES NOMINAL IN |
| First End Step Length | 0.312 INCHES NOMINAL IN |
| Largest Step Diameter | 0.437 INCHES NOMINAL IN |
| First End Style | SQUARE (ROUND CORNERS) |
| Material Document and Classification | MIL-S-5000 MIL SPEC ALL MATERIAL RESPONSES |
| End Similarity | IDENTICAL |
| Material | STEEL COMP 4340 |
| 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 |
|---|---|
| S6135-20684-1 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 3040-00-012-6026 is a Shaft,shouldered, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-012-6026 has 1 manufacturer part number on file: S6135-20684-1 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6135-20684-1: First End Width Across Flats: 0.280 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN; Step Quantity: 5; First End Diameter: 0.4370 INCHES NOMINAL IN; First End Step Length: 0.312 INCHES NOMINAL 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.