The Gear,worm, cataloged under National Stock Number 3020-01-208-7189, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-208-7189 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Helix Angle | 45.0000 DEGREES |
| Hub Nominal Diameter | 2.376 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.000 INCHES FIRST END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.1810 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 11.125 INCHES IN |
| Pressure Angle | 45.0000 DEGREES |
| Material | NICKEL ALLOY OVERALL |
| Face Nominal Width | 0.125 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 |
|---|---|
| SSBN640-300-2119310 | D/9 Drawing number reference only U.S. Government activity |
| 76774-30X3 PIECE 2 | 3/2 Design control — primary reference U.S. Government activity |
| SSBN640-300-2119310 PIECE 2 | 5/2 Secondary reference U.S. Government activity |
| 76774-30X3 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-208-7189 is a Gear,worm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-208-7204. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-208-7189: Thread Form Direction: RIGHT-HAND; Helix Angle: 45.0000 DEGREES; Hub Nominal Diameter: 2.376 INCHES FIRST END IN; Nominal Distance Between Body Face and Protruding Hub End: 1.000 INCHES FIRST END IN. 14 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.