The Gear,helical, cataloged under National Stock Number 3020-00-288-2950, 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 Westinghouse Electric Corp. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-288-2950 |
| Primary Part Number | 10A5281PC1 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.2500 INCHES BOTH ENDS IN |
| Teeth Quantity | 18 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 5.252 INCHES BOTH ENDS IN |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| 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 | 6.6081 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 6.9414 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 | X |
| Part Number | Manufacturer |
|---|---|
| 10A5281PC1 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 3274894PC1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-288-2950 is a Gear,helical, manufactured by Westinghouse Electric Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-288-2950 has 1 manufacturer part number on file: 10A5281PC1 (Westinghouse Electric Corp).
Key specifications for 10A5281PC1: Bore Nominal Diameter: 3.2500 INCHES BOTH ENDS IN; Teeth Quantity: 18; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 5.252 INCHES BOTH ENDS IN. 19 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.