The Gear,helical, cataloged under National Stock Number 3020-00-488-8308, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-488-8308 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 EXTERNALLY LUBRICATED BEARING |
| Bore Nominal Diameter | 1.3438 INCHES BOTH ENDS IN |
| Helix Angle | 12.5000 DEGREES |
| Teeth Quantity | 28 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.8120 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 2.0940 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 3.046 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 |
|---|---|
| 2801311 | 3/9 Design control — primary reference U.S. Government activity |
| 2801311 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-488-8308 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5950-01-121-7880, 5331-01-275-5946. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-488-8308: Furnished Items and Quantity: 1 EXTERNALLY LUBRICATED BEARING; Bore Nominal Diameter: 1.3438 INCHES BOTH ENDS IN; Helix Angle: 12.5000 DEGREES; Teeth Quantity: 28. 16 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.