The Gear,worm, cataloged under National Stock Number 3020-00-892-4573, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-892-4573 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Thread Form Direction | LEFT-HAND |
| Bore Nominal Diameter | 0.313 INCHES BOTH ENDS IN |
| Helix Angle | 6.8500 DEGREES |
| Hub Nominal Diameter | 0.425 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.425 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.365 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.125 INCHES SECOND END IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.250 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 0.5040 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Thread Form Quantity | 2 |
| Nominal Outside Diameter | 0.564 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.765 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 |
|---|---|
| 64933 | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-00-892-4573 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): 5120-01-417-1422. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-892-4573: Thread Form Direction: LEFT-HAND; Bore Nominal Diameter: 0.313 INCHES BOTH ENDS IN; Helix Angle: 6.8500 DEGREES; Hub Nominal Diameter: 0.425 INCHES SECOND END IN. 19 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.