The Gear,internal, cataloged under National Stock Number 3020-01-434-4643, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-434-4643 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 19.505 INCHES BOTH ENDS IN |
| Teeth Quantity | 80 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 12 COUNTERBORED AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Nominal Diameter | 0.781 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Teeth Type | SPUR |
| Nominal Overall Length | 2.000 INCHES IN |
| Style Designator | PLAIN RING |
| Material Document and Classification | ASTM-AS14 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 20.0000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 23.998 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| PL-H554AX001 REV P FIND NO 114 | 5/2 Secondary reference U.S. Government activity |
| 117838 | 3/2 Design control — primary reference U.S. Government activity |
| PL-H554AX001 | D/9 Drawing number reference only U.S. Government activity |
| C554AX115 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-434-4643 is a Gear,internal, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-434-4643: Bore Nominal Diameter: 19.505 INCHES BOTH ENDS IN; Teeth Quantity: 80; Body Style: PLAIN, SOLID; Bore Style: PLAIN BOTH ENDS. 15 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.