The Clamp,hub, cataloged under National Stock Number 3040-01-420-1121, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-420-1121 |
| Primary Part Number | 211042018 |
| Item Name | Clamp,hub |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63 MICROINCHES INSIDE PERIPHERY |
| Plain Hole Diameter | 0.5310 INCHES NOMINAL IN |
| Clamp Securing Hole Style | THREADED |
| Style Designator | ROUND, SINGLE BOLT SECURED |
| Outside Diameter | 6.000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.500 INCHES IN |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Bore Diameter | 3.9999 INCHES MINIMUM AND 4.0010 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY |
| Thickness | 4.3100 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 |
|---|---|
| 512-6405295-10 | Naval Sea Systems Command (USA) |
| 211042018 PRIMARY | Naval Sea Systems Command (USA) |
| 512-6404873-17 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405295 | D/9 Drawing number reference only Naval Sea Systems Command |
| DF6501-70 FN-10 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6404873 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-420-1121 is a Clamp,hub, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-420-1121 has 3 manufacturer part numbers on file: 512-6405295-10 (Naval Sea Systems Command), 211042018 (Naval Sea Systems Command), 512-6404873-17 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-420-1159, 3040-01-420-1162. Verify interchangeability with system specifications before substitution.
Key specifications for 211042018: Surface Finish: 63 MICROINCHES INSIDE PERIPHERY; Plain Hole Diameter: 0.5310 INCHES NOMINAL IN; Clamp Securing Hole Style: THREADED; Style Designator: ROUND, SINGLE BOLT SECURED. 10 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.