The Shaft,shouldered, cataloged under National Stock Number 3040-01-502-3016, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is B.w. Elliott Manufacturing Co., Llc. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-502-3016 |
| Primary Part Number | 12108M502D ITEM 21 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | B.w. Elliott Manufacturing Co., Llc |
| Status | ACTIVE |
| First End Width Across Flats | 0.6240 INCHES MINIMUM AND 0.6260 INCHES MAXIMUM IN |
| Second End Hole Diameter | 0.1350 INCHES MINIMUM AND 0.1420 INCHES MAXIMUM IN |
| Step Quantity | 6 |
| First End Diameter | 0.8030 INCHES MINIMUM AND 0.8130 INCHES MAXIMUM IN |
| First End Step Length | 2.8800 INCHES NOMINAL IN |
| Second End Diameter | 0.6210 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.813 INCHES MAXIMUM IN |
| First End Style | SQUARE (ROUND CORNERS) |
| Second End Keyway Width | 0.1890 INCHES MINIMUM AND 0.1910 INCHES MAXIMUM IN |
| Material Document and Classification | AISI11L41 STL NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 0.6250 INCHES NOMINAL IN |
| Second End Hole Depth | 0.6230 INCHES MAXIMUM IN |
| Second End Keyway Depth | 0.1030 INCHES MINIMUM AND 0.1060 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAY AND CROSS DRILLED HOLE |
| Material | STEEL |
| External Keyway Length | 0.7000 INCHES MINIMUM SECOND END 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 |
|---|---|
| 12108M502D ITEM 21 PRIMARY | B.w. Elliott Manufacturing Co., Llc (USA) |
| 12291M4D | B.w. Elliott Manufacturing Co., Llc (USA) |
NSN 3040-01-502-3016 is a Shaft,shouldered, manufactured by B.w. Elliott Manufacturing Co., Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-502-3016 has 2 manufacturer part numbers on file: 12108M502D ITEM 21 (B.w. Elliott Manufacturing Co., Llc), 12291M4D (B.w. Elliott Manufacturing Co., Llc).
Key specifications for 12108M502D ITEM 21: First End Width Across Flats: 0.6240 INCHES MINIMUM AND 0.6260 INCHES MAXIMUM IN; Second End Hole Diameter: 0.1350 INCHES MINIMUM AND 0.1420 INCHES MAXIMUM IN; Step Quantity: 6; First End Diameter: 0.8030 INCHES MINIMUM AND 0.8130 INCHES MAXIMUM IN. 17 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.