The Gear,helical, cataloged under National Stock Number 3020-01-251-5879, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-251-5879 |
| Primary Part Number | 5210314 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 1.251 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 5.626 INCHES BOTH ENDS IN |
| Helix Angle | 18.9966 DEGREES |
| Teeth Quantity | 96 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Tooth Direction | LEFT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 20.2667 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 20.662 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 3.719 INCHES BOTH ENDS IN |
| Pressure Angle | 25.0000 DEGREES |
| Face Nominal Width | 4.003 INCHES 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 |
|---|---|
| 5210314 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3020-01-251-5879 is a Gear,helical, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-251-5879 has 1 manufacturer part number on file: 5210314 (Naval Sea Systems Command).
Key specifications for 5210314: Keyway Nominal Width: 1.251 INCHES BOTH ENDS IN; Bore Nominal Diameter: 5.626 INCHES BOTH ENDS IN; Helix Angle: 18.9966 DEGREES; Teeth Quantity: 96. 16 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.