The Gear,helical, cataloged under National Stock Number 3020-00-294-7530, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-294-7530 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.2500 INCHES BOTH ENDS IN |
| Helix Angle | 20.0000 DEGREES |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Teeth Quantity | 35 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.4062 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.047 INCHES SECOND END IN |
| First Step Nominal Length | 0.032 INCHES SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE HUB |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE TEETH |
| Pitch Diameter | 0.7700 INCHES MINIMUM AND 0.7720 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.3740 INCHES SECOND END IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Mounting Hole Nominal Thread Size | 0.164 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.0156 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.8132 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 32 TRANSVERSELY THROUGH HUB FIRST END |
| End Nominal Diameter | 0.3125 INCHES SECOND END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | PLASTIC TEETH |
| Material | STEEL HUB |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SM-B-338402 | 3/2 Design control — primary reference U.S. Government activity |
| 11052AA | 5/9 Secondary reference Bell and Howell Phillipsburg Co Corporate Offices |
NSN 3020-00-294-7530 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-294-7530: Bore Nominal Diameter: 0.2500 INCHES BOTH ENDS IN; Helix Angle: 20.0000 DEGREES; Hub Nominal Diameter: 0.500 INCHES FIRST END IN; Teeth Quantity: 35. 30 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.