The Gear,internal, cataloged under National Stock Number 3020-01-568-5210, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-568-5210 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633,SC2,TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | 33307-90017-1 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.500 INCHES NOMINAL IN |
| Nominal Outside Diameter | 4.200 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Pressure Angle | 1.0 DEGREES |
| Face Nominal Width | 1.250 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 33307-40208-1 | 3/2 Design control — primary reference U.S. Government activity |
| 33307-40208 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-568-5210 is a Gear,internal, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3020-01-568-5721. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-568-5210: Surface Treatment Document and Classification: ASTM B633,SC2,TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: HUBLESS; Material Document and Classification: 33307-90017-1 FED STD SINGLE MATERIAL RESPONSE OVERALL; Pitch Diameter: 2.500 INCHES NOMINAL IN. 8 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.
NSN 3020-01-568-5210 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.