The Gear,helical, cataloged under National Stock Number 3020-01-424-9146, 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 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-424-9146 |
| Primary Part Number | 6352187 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.5000 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.8755 INCHES BOTH ENDS IN |
| Helix Angle | 20.3351 DEGREES |
| Hub Nominal Diameter | 3.3800 INCHES SECOND END IN |
| Teeth Quantity | 90 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 2.0620 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | -AISI 4150 FED STD SINGLE MATERIAL RESPONSE FIRST GEAR |
| Pitch Diameter | 9.5980 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 9.7980 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.7870 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL FIRST GEAR |
| Body Recess Nominal Depth | 0.6870 INCHES FIRST END IN |
| Face Nominal Width | 1.5000 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 |
|---|---|
| 6352187 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| R67-760-25 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-424-9146 is a Gear,helical, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-424-9146 has 1 manufacturer part number on file: 6352187 (Naval Sea Systems Command).
Key specifications for 6352187: Keyway Nominal Width: 0.5000 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.8755 INCHES BOTH ENDS IN; Helix Angle: 20.3351 DEGREES; Hub Nominal Diameter: 3.3800 INCHES SECOND END IN. 20 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.