The Shaft,shouldered, cataloged under National Stock Number 3040-01-305-9856, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-305-9856 |
| Primary Part Number | 36057820 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Step Quantity | 5 |
| First End Diameter | 0.7480 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 0.531 INCHES NOMINAL IN |
| Largest Step Diameter | 1.260 INCHES NOMINAL IN |
| First End Style | INDENTED FLAT KEYWAY |
| Material Document and Classification | QQ-S-281,CL A FED SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.112 INCHES NOMINAL IN |
| End Similarity | IDENTICAL |
| Material | NICKEL ALLOY |
| External Keyway Length | 1.005 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.1890 INCHES NOMINAL 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 |
|---|---|
| 36057820 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 709-6129491 ITEM 11 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 709-6129491 | D/9 Drawing number reference only Naval Sea Systems Command |
| 36057820 | 5/9 Secondary reference Tec Design & Manufacturing, Inc. |
NSN 3040-01-305-9856 is a Shaft,shouldered, manufactured by Derbyshire Machine & Tool Co, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-305-9856 has 2 manufacturer part numbers on file: 36057820 (Derbyshire Machine & Tool Co), 709-6129491 ITEM 11 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-308-0725, 3020-01-309-1037, 5365-01-471-8402. Verify interchangeability with system specifications before substitution.
Key specifications for 36057820: Step Quantity: 5; First End Diameter: 0.7480 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 0.531 INCHES NOMINAL IN; Largest Step Diameter: 1.260 INCHES NOMINAL IN. 11 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.