The Gear,antibacklash,spur, cataloged under National Stock Number 3020-01-110-4420, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-110-4420 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 160 |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Overall Length | 0.439 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 2.5000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 2.5312 INCHES IN |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.125 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 |
|---|---|
| 40530-1 | 3/2 Design control — primary reference U.S. Government activity |
| 40530-1 | 5/9 Secondary reference Datron Systems Inc |
NSN 3020-01-110-4420 is a Gear,antibacklash,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6920-01-206-6358. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-110-4420: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Teeth Quantity: 160; Bore Style: PLAIN BOTH ENDS; Nominal Overall Length: 0.439 INCHES IN. 9 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.