The Gear,spur, cataloged under National Stock Number 3020-00-474-2802, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-474-2802 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.063 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.189 INCHES BOTH ENDS IN |
| Teeth Quantity | 48 |
| Body Style | WEBBED, OFFSET, SOLID |
| Counterbore Nominal Diameter | 0.380 INCHES SECOND END IN |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.281 INCHES FIRST END IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.375 INCHES IN |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | 66,AISI/SAE E4340H FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 0.781 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.031 INCHES BOTH ENDS IN |
| Nominal Distance From End to First Groove | 0.031 INCHES FIRST END IN |
| End Nominal Diameter | 0.313 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP E4340H OVERALL |
| First Groove Nominal Diameter | 0.290 INCHES FIRST END IN |
| Counterbore Nominal Depth | 0.047 INCHES SECOND END IN |
| First Groove Nominal Width | 0.028 INCHES FIRST END IN |
| Face Nominal Width | 0.094 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 |
|---|---|
| 51537 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-474-2802 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5342-00-664-7627, 2940-01-331-3594. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-474-2802: Keyway Nominal Width: 0.063 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.189 INCHES BOTH ENDS IN; Teeth Quantity: 48; Body Style: WEBBED, OFFSET, SOLID. 24 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.