The Gear,helical, cataloged under National Stock Number 3020-01-211-5449, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-211-5449 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 11.250 INCHES BOTH ENDS IN |
| Helix Angle | 30.1855 DEGREES |
| Teeth Quantity | 132 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 27.0 ROCKWELL C NOMINAL OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | QQ-N-286,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 12.0035 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 12.750 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | NICKEL ALLOY OVERALL |
| Face Nominal Width | 1.250 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 |
|---|---|
| 8-52-145 | 3/9 Design control — primary reference Itw Heartland Components Inc |
| 8-52-145 | 5/9 Secondary reference Illinois Tool Wks Inc Linac Div |
NSN 3020-01-211-5449 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-211-5449: Bore Nominal Diameter: 11.250 INCHES BOTH ENDS IN; Helix Angle: 30.1855 DEGREES; Teeth Quantity: 132; Body Style: PLAIN, SOLID. 15 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.