The Gear,spur, cataloged under National Stock Number 3020-00-288-3499, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-288-3499 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.687 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.9985 INCHES FIRST END IN |
| Teeth Quantity | 8 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.8339 INCHES FIRST END IN |
| Hardness Rating | 23.0 ROCKWELL C NOMINAL HUB |
| Hardness Rating | 90.0 ROCKWELL SUPERFICIAL 15-N MINIMUM TEETH |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-6709 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.9990 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 2.4972 INCHES IN |
| Pressure Angle | 30.0000 DEGREES |
| Material | STEEL UNS K24065 OVERALL |
| Face Nominal Width | 0.813 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 |
|---|---|
| 02-577 | 3/2 Design control — primary reference U.S. Government activity |
| S2215-5 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-288-3499 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): 5940-01-396-9546. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-288-3499: Bore Nominal Diameter: 0.687 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.9985 INCHES FIRST END IN; Teeth Quantity: 8; Body Style: PLAIN, SOLID. 17 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.