The Gear,helical, cataloged under National Stock Number 3020-00-540-7428, 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 27 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 | 3020-00-540-7428 |
| Primary Part Number | 1608434 |
| 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 |
| Bore Nominal Diameter | 2.0050 INCHES BOTH ENDS IN |
| Helix Angle | 15.0000 DEGREES |
| Hub Nominal Diameter | 3.3750 INCHES SECOND END IN |
| Teeth Quantity | 65 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.0310 INCHES FIRST END IN |
| First Step Nominal Length | 0.1250 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM TEETH |
| Hardness Rating | 93.0 ROCKWELL B MINIMUM AND 101.0 ROCKWELL B MAXIMUM HUB |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.1250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 3.3750 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 31 BOTH ENDS |
| End Nominal Length | 0.9060 INCHES FIRST END IN |
| Nominal Outside Diameter | 8.3650 INCHES IN |
| End Nominal Diameter | 2.7563 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8640 OVERALL |
| Spline Pitch Diameter | 1.9375 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 2.000 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 |
|---|---|
| 1608434 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-540-7428 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 3020-00-540-7428 has 1 manufacturer part number on file: 1608434 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1608434: Bore Nominal Diameter: 2.0050 INCHES BOTH ENDS IN; Helix Angle: 15.0000 DEGREES; Hub Nominal Diameter: 3.3750 INCHES SECOND END IN; Teeth Quantity: 65. 27 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.