The Gear,helical, cataloged under National Stock Number 3020-00-511-4444, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-511-4444 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Helix Angle | 45.0000 DEGREES45.0000 DEGREES |
| Hub Nominal Diameter | 1.250 INCHES FIRST END1.250 INCHES FIRST END IN |
| Teeth Quantity | 3535 |
| Clamping Surface Nominal Length | 0.2810 INCHES SECOND END0.2810 INCHES SECOND END IN |
| Body Style | PLAIN, SOLIDPLAIN, SOLID |
| Teeth Type | SINGLE HELIXSINGLE HELIX |
| Nominal Overall Length | 0.812 INCHES0.812 INCHES IN |
| Style Designator | PROTRUDING HUBSPROTRUDING HUBS |
| Pitch Diameter | 1.4540 INCHES MINIMUM AND 1.4540 INCHES MINIMUM AND 1.4580 INCHES MAXIMUM1.4580 INCHES MAXIMUM IN |
| Pressure Angle | 14.5000 DEGREES14.5000 DEGREES |
| Material | STEEL OVERALL |
| Attachment Method | CLAMPCLAMP |
| 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 |
|---|---|
| 52513A | 3/9 Design control — primary reference U.S. Government activity |
| 52513 | 5/9 Secondary reference U.S. Government activity |
| SMB157212 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-511-4444 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5855-01-615-7672. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-511-4444: Helix Angle: 45.0000 DEGREES45.0000 DEGREES; Hub Nominal Diameter: 1.250 INCHES FIRST END1.250 INCHES FIRST END IN; Teeth Quantity: 3535; Clamping Surface Nominal Length: 0.2810 INCHES SECOND END0.2810 INCHES SECOND END IN. 12 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.