The Gearshaft,spur, cataloged under National Stock Number 3040-01-417-2787, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-417-2787 |
| Primary Part Number | 593-6960891 PC 13 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL |
| Shaft Largest Diameter | 4.000 INCHES NOMINAL IN |
| Shaft End Size | 1.875 INCHES AND 2.126 INCHES IN |
| Teeth Quantity | 21 |
| Diametral Pitch | 6 |
| Precision Classification | ACCURACY GRADE 9 |
| Gear Outside Diameter | 3.833 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 8.563 INCHES NOMINAL IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL |
| Gear Material | STEEL |
| Shaft End Type | KEYWAY 2 WOODRUFF AND FLAT GROOVED, SLOTTED |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 3.250 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 |
|---|---|
| 593-6960891 PC 13 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6960891 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-417-2787 is a Gearshaft,spur, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-417-2787 has 1 manufacturer part number on file: 593-6960891 PC 13 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-417-2790, 3020-01-421-1641. Verify interchangeability with system specifications before substitution.
Key specifications for 593-6960891 PC 13: Shaft Type: SHOULDERED; Shaft Material: STEEL; Shaft Largest Diameter: 4.000 INCHES NOMINAL IN; Shaft End Size: 1.875 INCHES AND 2.126 INCHES IN. 15 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.