The Gear,helical, cataloged under National Stock Number 3020-00-288-2948, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-288-2948 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.2500 INCHES BOTH ENDS IN |
| Teeth Quantity | 23 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 5.251 INCHES BOTH ENDS IN |
| Tooth Direction | RIGHT |
| Mounting Hole Type and Quantity | 6 COUNTERBORED AND 6 PLAIN AXIALLY THROUGH BODY SECOND END |
| Mounting Hole Nominal Diameter | 0.531 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Pitch Diameter | 6.6012 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 6.9345 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Bolt Hole Circle Nominal Diameter | 4.250 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Counterbore Nominal Depth | 0.6880 INCHES BOTH ENDS IN |
| Attachment Method | MOUNTING HOLE |
| 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 | N |
| Reference | Meaning |
|---|---|
| 10A5281PC3 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 10A5281PC3 | 5/2 Secondary reference U.S. Government activity |
| 3274894PC3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-288-2948 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-288-2948: Bore Nominal Diameter: 3.2500 INCHES BOTH ENDS IN; Teeth Quantity: 23; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 5.251 INCHES BOTH ENDS IN. 18 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.