The Gear,internal, cataloged under National Stock Number 3020-00-919-0139, 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23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-919-0139 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Teeth Quantity | 115 |
| Body Style | PLAIN, SOLID |
| Mounting Hole Type and Quantity | 10 THREADED AXIALLY THROUGH BODY SECOND END |
| Mounting Hole Type and Quantity | 27 PLAIN AXIALLY THROUGH BODY FIRST END |
| Precision Classification | QUALITY NUMBER 10 |
| Mounting Hole Nominal Diameter | 0.189 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Nominal Diameter | 0.257 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Teeth Type | SPUR |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.593 INCHES IN |
| Material Document and Classification | 66,AISI 416/SAE 51416 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.5938 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Mounting Hole Nominal Thread Size | 0.138 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Nominal Outside Diameter | 3.968 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 32 AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Thread Quantity Per Inch | 20 AXIALLY THROUGH BODY SECOND END |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 416 OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.237 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 |
|---|---|
| 324-694 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-919-0139 is a Gear,internal, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-919-0139: Teeth Quantity: 115; Body Style: PLAIN, SOLID; Mounting Hole Type and Quantity: 10 THREADED AXIALLY THROUGH BODY SECOND END; Mounting Hole Type and Quantity: 27 PLAIN AXIALLY THROUGH BODY FIRST END. 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.