The Gear,helical, cataloged under National Stock Number 3020-00-276-7283, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-276-7283 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Helix Angle | 60.0000 DEGREES |
| Hub Nominal Diameter | 0.356 INCHES FIRST END IN |
| Teeth Quantity | 7 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 1117 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.4310 INCHES MINIMUM AND 0.4330 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 0.4950 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 1117 OVERALL |
| Face Nominal Width | 0.500 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 |
| Reference | Meaning |
|---|---|
| 611389 | 3/9 Design control — primary reference Bell and Howell Phillipsburg Co Corporate Offices |
NSN 3020-00-276-7283 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-276-7283: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Helix Angle: 60.0000 DEGREES; Hub Nominal Diameter: 0.356 INCHES FIRST END IN; Teeth Quantity: 7. 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.