The Gear,spur, cataloged under National Stock Number 3020-00-541-3573, 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19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-541-3573 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.1275 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.181 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.7500 INCHES FIRST END IN |
| Teeth Quantity | 28 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.2245 INCHES FIRST END IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM HUB |
| Hardness Rating | 81.0 ROCKWELL C MINIMUM AND 81.5 ROCKWELL C MAXIMUM TEETH |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.3330 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 2.4975 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.690 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4615 OVERALL |
| Face Nominal Width | 0.438 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 |
|---|---|
| 543-464 | 3/9 Design control — primary reference Profile Gear Corp |
| 553035 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
NSN 3020-00-541-3573 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3120-00-919-9445. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-541-3573: Keyway Nominal Width: 0.1275 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.181 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.7500 INCHES FIRST END IN; Teeth Quantity: 28. 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.