The Gear,worm Wheel, cataloged under National Stock Number 3020-00-088-4593, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-088-4593 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.623 INCHES COUNTER BORE SECOND END IN |
| Helix Angle | 21.7998 DEGREES |
| Teeth Quantity | 30 |
| Second Step Nominal Diameter | 1.813 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.260 INCHES COUNTER BORE SECOND END IN |
| Third Step Nominal Diameter | 1.625 INCHES FIRST END IN |
| Tooth Direction | RIGHT |
| Bore Style | W/COUNTERBORE COUNTER BORE SECOND END |
| Mounting Hole Type and Quantity | 4 THREADED AXIALLY THROUGH HUB SECOND END |
| Mounting Hole Type and Quantity | 6 THREADED AXIALLY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.094 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.341 INCHES FIRST END IN |
| First Step Nominal Length | 0.625 INCHES FIRST END IN |
| First Step Nominal Length | 0.185 INCHES SECOND END IN |
| Face Type | CONCAVE |
| Second Step Nominal Length | 0.188 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 1.8750 INCHES NOMINAL IN |
| First Step Nominal Diameter | 1.575 INCHES FIRST END IN |
| First Step Nominal Diameter | 2.211 INCHES SECOND END IN |
| Hub Style Designator | 3 STEPS FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| Mounting Hole Nominal Thread Size | 0.190 INCHES AXIALLY THROUGH HUB FIRST END IN |
| Mounting Hole Nominal Thread Size | 0.190 INCHES AXIALLY THROUGH HUB SECOND END IN |
| End Nominal Length | 0.281 INCHES FIRST END IN |
| End Nominal Length | 0.624 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.043 INCHES IN |
| End Nominal Diameter | 1.969 INCHES SECOND END IN |
| End Nominal Diameter | 1.566 INCHES FIRST END 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 |
|---|---|
| 031C975-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-088-4593 is a Gear,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-024-5987. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-088-4593: Bore Nominal Diameter: 0.623 INCHES COUNTER BORE SECOND END IN; Helix Angle: 21.7998 DEGREES; Teeth Quantity: 30; Second Step Nominal Diameter: 1.813 INCHES FIRST END IN. 30 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.