The Gear,internal, cataloged under National Stock Number 3020-01-054-9530, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-054-9530 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Teeth Quantity | 123 |
| Body Style | PLAIN, SOLID |
| Flange Nominal Thickness | 0.250 INCHES IN |
| Flange Nominal Diameter | 9.625 INCHES IN |
| Mounting Hole Type and Quantity | 4 THREADED AXIALLY THROUGH FLANGE |
| Mounting Hole Type and Quantity | 8 THREADED AXIALLY THROUGH BODY FIRST END |
| Precision Classification | QUALITY NUMBER 10 |
| Teeth Type | SPUR |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.750 INCHES IN |
| Style Designator | FLANGED RING |
| Pitch Diameter | 7.5650 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH FLANGE IN |
| Nominal Outside Diameter | 9.000 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Bolt Hole Circle Nominal Diameter | 8.500 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Bolt Hole Circle Nominal Diameter | 9.281 INCHES AXIALLY THROUGH FLANGE IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH FLANGE |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 302732 | 3/9 Design control — primary reference Symetrics Industries, Llc Dba Extant Aerospace Div Symetrics Industries Dba Extant Aerospace |
NSN 3020-01-054-9530 is a Gear,internal, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-054-9530: Teeth Quantity: 123; Body Style: PLAIN, SOLID; Flange Nominal Thickness: 0.250 INCHES IN; Flange Nominal Diameter: 9.625 INCHES IN. 23 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.