The Gear,bevel, cataloged under National Stock Number 3020-00-253-4340, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-253-4340 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.8120 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 5.7500 INCHES SECOND END IN |
| Teeth Quantity | 19 |
| Body Style | WEBBED, OFFSET, SOLID |
| Pitch Angle | 39.5596 DEGREES |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Mounting Hole Type and Quantity | 4 THREADED TRANSVERSELY THROUGH HUB SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 2.2150 INCHES SECOND END IN |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 4.7500 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Pitch Diameter | 12.0950 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 8 BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.3750 INCHES TRANSVERSELY THROUGH HUB SECOND END IN |
| Nominal Outside Diameter | 12.8040 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB SECOND END |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 1.2500 INCHES FIRST END IN |
| Face Nominal Width | 2.5000 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 |
|---|---|
| 264725A | 3/9 Design control — primary reference Lucas Western Inc |
NSN 3020-00-253-4340 is a Gear,bevel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-253-4340: Bore Nominal Diameter: 3.8120 INCHES BOTH ENDS IN; Hub Nominal Diameter: 5.7500 INCHES SECOND END IN; Teeth Quantity: 19; Body Style: WEBBED, OFFSET, SOLID. 22 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.