The Gear,helical, cataloged under National Stock Number 3020-01-308-0734, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-308-0734 |
| Primary Part Number | 319685-2 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Keyway Nominal Width | 0.125 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.622 INCHES BOTH ENDS IN |
| Helix Angle | 7.0000 DEGREES |
| Teeth Quantity | 12 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Precision Classification | QUALITY NUMBER 11 |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 90.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 94.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.2000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 1.400 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.373 INCHES BOTH ENDS IN |
| Pressure Angle | 24.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.748 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 |
|---|---|
| 319685-2 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 319685 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-01-308-0734 is a Gear,helical, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-308-0734 has 1 manufacturer part number on file: 319685-2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-308-8825, 3120-01-360-2234. Verify interchangeability with system specifications before substitution.
Key specifications for 319685-2: Keyway Nominal Width: 0.125 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.622 INCHES BOTH ENDS IN; Helix Angle: 7.0000 DEGREES; Teeth Quantity: 12. 17 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.