The Gear,bevel, cataloged under National Stock Number 3020-01-200-9451, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-200-9451 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.876 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.500 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.125 INCHES SECOND END IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 30 |
| Body Style | WEBBED, SOLID |
| Pitch Angle | 32.0000 DEGREES |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.125 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.103 INCHES SECOND END IN |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 1.125 INCHES IN |
| Style Designator | SIDE FACE, PROTRUDING HUBS |
| Pitch Diameter | 5.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 5.283 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140H OVERALL |
| Face Nominal Width | 0.750 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 |
|---|---|
| 77643-70X9 PIECE 3 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-501-2159955 PIECE 3 | 5/2 Secondary reference U.S. Government activity |
| SSN637-501-2159955 | D/9 Drawing number reference only U.S. Government activity |
| 77643-70X9 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-200-9451 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): 3020-01-200-9452, 3020-01-204-9736. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-200-9451: Bore Nominal Diameter: 0.876 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.500 INCHES FIRST END IN; Hub Nominal Diameter: 2.125 INCHES SECOND END IN; Backlash Designation: GRADE C. 19 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.