The Shaft,shouldered, cataloged under National Stock Number 3040-01-287-7829, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-287-7829 |
| Primary Part Number | C-51-12986 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 9 |
| First End Diameter | 1.3900 INCHES NOMINAL IN |
| Second End Diameter | 0.9980 INCHES NOMINAL IN |
| Largest Step Diameter | 1.500 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.8390 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 0.9980 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 10 |
| Second End Style | SPLINED (STRAIGHT) |
| Material | STEEL |
| Second End Spline Length | 2.437 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 |
|---|---|
| C-51-12986 PRIMARY | Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland (USA) |
| Reference | Meaning |
|---|---|
| 26M01-5801 ITEM 4 | 5/2 Secondary reference U.S. Government activity |
| 26M01-5801 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-287-7829 is a Shaft,shouldered, manufactured by Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-287-7829 has 1 manufacturer part number on file: C-51-12986 (Illinois Tool Works Inc Dba Illinois Tool Works Inc Div Itw Heartland).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-298-8699. Verify interchangeability with system specifications before substitution.
Key specifications for C-51-12986: Surface Finish: 125.0 MICROINCHES; Step Quantity: 9; First End Diameter: 1.3900 INCHES NOMINAL IN; Second End Diameter: 0.9980 INCHES NOMINAL IN. 13 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.