The Gear,bevel, cataloged under National Stock Number 3020-00-540-7900, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-540-7900 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.625 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.750 INCHES SECOND END IN |
| Teeth Quantity | 20 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 31.2166 DEGREES |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.875 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 9 |
| Teeth Type | STRAIGHT |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 1.519 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.0000 INCHES NOMINAL IN |
| Hub Style Designator | PINNED SECOND END |
| Nominal Outside Diameter | 2.2220 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4320 OVERALL |
| Body Recess Nominal Depth | 0.1770 INCHES FIRST END IN |
| Face Nominal Width | 0.625 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 |
|---|---|
| 706054 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-540-7900 is a Gear,bevel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6625-01-283-8824, 4310-01-435-3230. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-540-7900: Bore Nominal Diameter: 0.625 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.750 INCHES SECOND END IN; Teeth Quantity: 20; Body Style: PLAIN, SOLID. 20 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.