The Shaft,shouldered, cataloged under National Stock Number 3040-01-494-4239, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (CAGE 07524) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-494-4239 |
| Primary Part Number | 801409 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| Status | ACTIVE |
| 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 |
|---|---|
| 801409 PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| Reference | Meaning |
|---|---|
| 1801490 ITEM NO. 6 | 5/9 Secondary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 801409 | 3/9 Design control — primary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 801409 ITEM NO. 6 | 5/9 Secondary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 1801490 | D/9 Drawing number reference only Blackmer System One, Inc. Div Blackmer System One, Inc. |
NSN 3040-01-494-4239 is a Shaft,shouldered, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-494-4239 has 1 manufacturer part number on file: 801409 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
5 possible matches (shared part number, not a government interchangeability claim): 4730-01-494-4243, 4320-01-494-4249, 4320-01-494-4252. Verify interchangeability with system specifications before substitution.
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.