The Gearshaft,spur, cataloged under National Stock Number 3040-01-343-3699, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Vertex Modernization and Sustainment Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-343-3699 |
| Primary Part Number | 715556-1 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Vertex Modernization and Sustainment Llc |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL COMP 4340 |
| Shaft Largest Diameter | 0.500 INCHES NOMINAL IN |
| Shaft End Size | 0.400 INCHES AND 0.210 INCHES IN |
| Teeth Quantity | 25 |
| Diametral Pitch | 20 |
| Gear Outside Diameter | 1.350 INCHES NOMINAL IN |
| Longer Shaft Segment Length | 3.095 INCHES NOMINAL IN |
| Gear Material | STEEL COMP 4340 |
| Shaft End Type | KEYWAY WOODRUFF AND THREADED EXTERNAL |
| Gear Location on Shaft | OFF CENTER BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| Face Width | 0.590 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 715556-1 PRIMARY | Vertex Modernization and Sustainment Llc (USA) |
| Reference | Meaning |
|---|---|
| 715556 | D/9 Drawing number reference only U.S. Government activity |
| 715556-1 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-01-343-3699 is a Gearshaft,spur, manufactured by Vertex Modernization and Sustainment Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-343-3699 has 1 manufacturer part number on file: 715556-1 (Vertex Modernization and Sustainment Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5325-01-433-8969, 7035-01-645-4885. Verify interchangeability with system specifications before substitution.
Key specifications for 715556-1: Shaft Type: SHOULDERED; Shaft Material: STEEL COMP 4340; Shaft Largest Diameter: 0.500 INCHES NOMINAL IN; Shaft End Size: 0.400 INCHES AND 0.210 INCHES IN. 13 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.
NSN 3040-01-343-3699 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.