The Shaft,shouldered, cataloged under National Stock Number 3040-01-182-6844, 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 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-182-6844 |
| Primary Part Number | 709-4684875 ITEM 18 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| Step Quantity | 6 |
| First End Diameter | 1.4960 INCHES MINIMUM AND 1.4980 INCHES MAXIMUM IN |
| First End Distance From Keyway Center to End | 1.002 INCHES NOMINAL IN |
| Largest Step Diameter | 1.820 INCHES NOMINAL IN |
| First End Style | WOODRUFF KEYWAY |
| Material Document and Classification | MIL-S-1222 TY1 SYN 78 MIL SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | IDENTICAL |
| Material | STEEL |
| External Keyway Length | 1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM FIRST END IN |
| First End Keyway Width | 0.3750 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM 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 |
|---|---|
| 709-4684875 ITEM 18 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 87832-1604 ITEM | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 87832-1604 | 3/2 Design control — primary reference U.S. Government activity |
| 4684875 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-182-6844 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-182-6844 has 1 manufacturer part number on file: 709-4684875 ITEM 18 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-211-9524. Verify interchangeability with system specifications before substitution.
Key specifications for 709-4684875 ITEM 18: Surface Finish: 63.0 MICROINCHES; Step Quantity: 6; First End Diameter: 1.4960 INCHES MINIMUM AND 1.4980 INCHES MAXIMUM IN; First End Distance From Keyway Center to End: 1.002 INCHES NOMINAL IN. 11 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.