The Shaft,shouldered, cataloged under National Stock Number 3040-00-802-2064, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Carver Pump Company. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-802-2064 |
| Primary Part Number | 2-8-57MK |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Second End External Thread Length | 0.500 INCHES NOMINAL IN |
| Step Quantity | 7 |
| First End Diameter | 0.9690 INCHES NOMINAL IN |
| Second End Diameter | 1.3783 INCHES NOMINAL IN |
| Largest Step Diameter | 1.625 INCHES NOMINAL IN |
| First End External Thread Length | 0.562 INCHES NOMINAL IN |
| First End Style | EXTERNALLY THREADED AND FLAT KEYWAY |
| Second End Keyway Width | 0.1880 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.188 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.094 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY THREADED AND FLAT KEYWAY |
| Material | NICKEL ALLOY K-500 |
| External Keyway Length | 0.750 INCHES NOMINAL SECOND END IN |
| External Keyway Length | 3.000 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.3750 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 |
|---|---|
| L-2268 | Rps-Fl, Inc. Dba Rps Inc (USA) |
| 2-8-57MK PRIMARY | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| 2-8-57MK | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 2HCS166PC6 | 5/9 Secondary reference General Signal Corp |
| 2HCS166PC6 | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| H3324683PC6 | 5/2 Secondary reference U.S. Government activity |
| 2-8-57MK | 5/9 Secondary reference General Signal Corp |
NSN 3040-00-802-2064 is a Shaft,shouldered, manufactured by Carver Pump Company, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-802-2064 has 2 manufacturer part numbers on file: L-2268 (Rps-Fl, Inc. Dba Rps Inc), 2-8-57MK (Carver Pump Company).
Key specifications for 2-8-57MK: Second End External Thread Length: 0.500 INCHES NOMINAL IN; Step Quantity: 7; First End Diameter: 0.9690 INCHES NOMINAL IN; Second End Diameter: 1.3783 INCHES NOMINAL 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.