The Gearshaft,spur, cataloged under National Stock Number 3040-01-621-0797, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-621-0797 |
| Primary Part Number | 531820-2 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Shaft Type | SHOULDERED |
| Shaft Material | STEEL UNS K24065 |
| Shaft Largest Diameter | 0.570 INCHES NOMINAL IN |
| Teeth Quantity | 18 |
| Diametral Pitch | 12 |
| Gear Outside Diameter | 1.409 INCHES NOMINAL IN |
| Gear Material | STEEL UNS K24065 |
| Gear Location on Shaft | MIDPOINT BETWEEN ENDS OF SHAFT |
| Pressure Angle | 20.0000 DEGREES |
| 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 |
|---|---|
| 531820-2 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 531820-2 | 5/9 Secondary reference Moog Military Aircraft Llc |
| 531820-2 | 3/9 Design control — primary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 3040-01-621-0797 is a Gearshaft,spur, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-621-0797 has 1 manufacturer part number on file: 531820-2 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 531820-2: Shaft Type: SHOULDERED; Shaft Material: STEEL UNS K24065; Shaft Largest Diameter: 0.570 INCHES NOMINAL IN; Teeth Quantity: 18. 9 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.