The Gear,internal, cataloged under National Stock Number 3020-01-306-4039, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-306-4039 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Pitch Diameter | 13.0000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 14.250 INCHES IN |
| Material | STEEL COMP 4140 OVERALL |
| Face Nominal Width | 2.500 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 |
|---|---|
| 700627 PIECE 5 | 5/9 Secondary reference Lantec Industries Inc |
| 401389 | 3/9 Design control — primary reference Lantec Industries Inc |
NSN 3020-01-306-4039 is a Gear,internal, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-445-3141, 5340-01-579-6023. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-306-4039: Pitch Diameter: 13.0000 INCHES NOMINAL IN; Nominal Outside Diameter: 14.250 INCHES IN; Material: STEEL COMP 4140 OVERALL; Face Nominal Width: 2.500 INCHES IN. 4 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.